JP2006248729A - Holding device and lifting conveyance means - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a holding device capable of properly suspending a flexible sheet body without imposing a burden thereon in manufacturing the flexible sheet body being a lifting conveyance object, and of simplifying a structure thereof. <P>SOLUTION: When this holding device is in a lifting state, support plates 33, a support shaft 34 and a restriction shaft 36 as an operation force transmission mechanism U2 make weights of an opening/closing mechanism U1 and a pair of holding plates 13 and 31 act, as operation force, on a pair of operation levers 9 and 10 and a link mechanism 21 as the opening/closing mechanism U1 to bring the pair of holding plates 13 and 31 into a closed state. Thereby, even if a driving source such as a cylinder unit is not particularly used, the peripheral part of the flexible sheet body S is sandwiched (held) by the pair of holding plates 13 and 31 in lifting it; and even if a ring-like hooking means or the like is particularly mounted to the peripheral part of the flexible sheet body S, the flexible sheet body S can be lifted. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gripping device and a lifting and conveying tool.

  When lifting and transporting a lifted transported object, a gripping device is used to grip the lifted transported object. Many gripping devices have been proposed. Basically, as shown in Patent Document 1, a pair of gripping plates that can be opened and closed are linked to a cylinder unit, and the cylinder unit is operated. Thus, the pair of gripping members are closed to sandwich (hold) the lifted conveyed product. Thereby, if this gripping device is attached to a lifting and conveying tool and the gripping device is used, the lifting and transporting object can be transported while being gripped. However, such a gripping device requires a drive source such as a cylinder unit, and the device itself must be large.

For this reason, in order to simplify the gripping device, when lifting and transporting a lifted transported object (for example, a flexible sheet), a plurality of hooks are attached to the peripheral portion of the lifted transported object while lifting. A plurality of chains are suspended from a transport tool, hooks are respectively attached to the lower end portions of the respective chains, and the hooks are hooked on the respective hook tools in a lifted transported object to be lifted and transported.
JP 7-48086 A

  However, in such a case, the lifted transported object can be reliably lifted and transported, but a plurality of hooks must be attached to the peripheral edge of the lifted transported object, which imposes a burden on the manufacture of the lifted transported object. It has become.

The present invention has been made in view of such circumstances, and a first technical problem thereof is that the lifted transported object can be accurately lifted without burdening the manufacture of the lifted transported object. An object of the present invention is to provide a gripping device capable of simplifying the structure.
A second technical problem is to provide a lifting and conveying tool using the gripping device.

In order to achieve the first technical problem, the present invention (the invention according to claim 1)
A gripping device attached to a lifting and conveying tool,
A pair of gripping plates;
An opening / closing mechanism that is mechanically linked to the pair of gripping plates and that opens and closes the pair of gripping plates based on the operation thereof;
An operating force that is mechanically linked to the open / close mechanism and is in a lifted state, and causes the open / close mechanism and the pair of gripping plates to act on the open / close mechanism using the weight of the open / close mechanism and the pair of gripping plates as an operating force. A transmission mechanism;
It is set as the structure provided. Preferred embodiments of the first aspect are as described in the second to eleventh aspects.

In order to achieve the second technical problem, the present invention (the invention according to claim 12)
A gripping device is attached to the structure, and when the gripping device holds the flexible sheet body, the lifting device grips the peripheral edge of the flexible sheet body,
The gripping device opens and closes a pair of gripping plates that are mechanically linked to the pair of gripping plates and opens and closes the pair of gripping plates based on the operation of the gripping plate. When the mechanism is mechanically linked to the opening / closing mechanism and is in a lifted state, the weight of the opening / closing mechanism and the pair of gripping plates is applied to the opening / closing mechanism as an operating force so that the pair of gripping plates are closed. And an actuating force transmission mechanism.

  According to the first aspect of the present invention, when in the suspended state, the operating force transmission mechanism causes the opening / closing mechanism to act on the opening / closing mechanism and the weight of the pair of gripping plates as the operating force, thereby closing the pair of gripping plates. Therefore, even when a drive source such as a cylinder unit is not used, the peripheral part of the lifted transported object can be clamped with a pair of gripping plates when lifting, and a special ring is attached to the peripheral part of the lifted transported object. The lifted transported object can be lifted without providing a hook or the like. For this reason, it is possible to provide a gripping device that can accurately lift the lifted transported object without imposing a burden on the manufacture of the lifted transported object, and can simplify the structure.

  According to the invention which concerns on Claim 2, when a pair of holding | grip board hold | maintains a flexible sheet | seat body in a lifting conveyance tool, it is holding | griping the peripheral part of this flexible sheet | seat body. Even when the lifted conveyed product is a flexible sheet body, the same effects as those of the first aspect can be obtained accurately.

  According to the invention of claim 3, when the support shaft is lifted via the support shaft from a state in which the pair of gripping plates, the link mechanism, and the pair of operating levers are arranged in a substantially horizontal direction, the support shaft is centered. Since the pair of gripping plates, the link mechanism, and the pair of operating levers are arranged to rotate in the swinging direction of one operating lever that opens the pair of gripping plates, In the lifted state, after one of the operating levers comes into contact with the restricting member due to the rotation, the rotating force that is still about to rotate is used as a reaction to move the actuator closer to the pair of operating levers. You can continue to apply power. Therefore, in the lifted state, the flexible sheet body is sandwiched between the pair of gripping plates by using the weights of the pair of gripping plates, the link mechanism, and the pair of operating levers without using a drive source such as a cylinder unit ( Specifically, a gripping device that can lift the flexible sheet body accurately without burdening the flexible sheet body and can simplify the structure is provided. It will be possible.

According to the fourth aspect of the present invention, one of the operating levers is an operating lever disposed on the upper side of the pair of operating levers, and the support shaft is substantially horizontal with the pair of gripping plates, the link mechanism, and the pair of operating levers. When lifted from the state aligned in the direction through the support shaft, the pair of gripping plates, the link mechanism, and the pair of operation levers are moved in the swing direction of the upper operation lever around the support shaft. Since it is arranged so as to rotate in a direction away from the lower-side operation lever of the pair of operation levers, when the regulating member and one operation lever are in contact with each other, The pair of gripping plates are positioned below the link mechanism and the pair of operating levers, so that the posture in which the flexible sheet body can be easily held can be obtained.
Further, when the restricting member and one of the operating levers are in contact with each other, the pair of gripping plates not only take a posture positioned below the link mechanism and the pair of operating levers, but also horizontally from the support shaft. Therefore, the load (weight) on the flexible sheet body side can also be taken in as a rotational force to rotate the pair of gripping plates, the link mechanism, and the pair of operating levers. Thus, the clamping force between the pair of gripping plates can be increased. For this reason, even if the load on the flexible sheet body increases, the clamping force of the pair of gripping plates can be increased accordingly, and the change in the weight on the flexible sheet body can be handled accurately.

  According to the invention which concerns on Claim 5, the outer edge of the operation lever of an upper arrangement | positioning is arrange | positioned below a 1st outer edge and this 1st outer edge in order toward the longitudinal direction outer end side of this operation lever of an upper arrangement | positioning. And a second outer edge that rises in a direction away from the actuating lever, and the regulating member is in a state in which the pair of gripping plates, the link mechanism, and the pair of actuating levers are lifted via the support shaft. Since the pair of gripping plates are set so as to contact the second outer edge when the pair of gripping plates are in the closed state, the shift amount (moment arm length) of the pair of gripping plates and the like that are displaced in the horizontal direction from the support shaft is reduced. It can suppress and it can suppress as much as possible that the rotational force which tries to rotate a pair of holding | grip board, a link mechanism, and a pair of operation lever falls. For this reason, the clamping force of a pair of holding | grip board with respect to a flexible sheet | seat body can be ensured in an appropriate state.

  According to the invention of claim 6, the link mechanism constitutes a four-bar link mechanism, and the upper-side operation lever and the lower-side operation lever are used as link members of the four-bar link mechanism. The number of parts can be reduced.

  According to the seventh aspect of the present invention, one gripping plate of the pair of gripping plates and the other gripping plate of the pair of gripping plates each have a columnar member on each inner surface, and one gripping A pair of gripping plates is closed because the columnar member of one gripping plate does not exist in the movement region of the columnar member of the other gripping plate based on the closing operation of the other gripping plate with respect to the plate In this case, the columnar members can be present without interfering with each other between the pair of gripping plates. For this reason, the flexible sheet body can be locally sandwiched between each columnar member and the inner surface of each gripping plate, and the flexible sheet body can be firmly sandwiched between the pair of gripping plates with the local clamping force. become.

According to the eighth aspect of the present invention, the cylindrical members located on the side closest to the link mechanism can be brought into contact with each other so that the pair of gripping plates can be in a predetermined open state in advance. The work of gripping the flexible sheet can be reduced.
Further, by applying an external force of a predetermined level or more through a pair of operating levers, the cylindrical members located closest to the link mechanism are moved relative to each other while rubbing, and the abutment relationship is released to obtain a sense of moderation. Therefore, it is possible to recognize that the gripping process of the flexible sheet body has properly passed through a predetermined stage with a sense of moderation.
Further, when the cylindrical members located on the side closest to the link mechanism move relative to each other while rubbing to release the contact relationship, the rubbing relationship between the two cylindrical members is a kind of stopper (resistance). And the transition of the pair of gripping plates from the closed state to the opening operation is restricted. For this reason, the flexible sheet body can be temporarily gripped with the pair of gripping plates until the rotational force based on the lifting works.

  According to the ninth aspect of the present invention, the upper-side grip plate and the lower-side grip plate are arranged on the inner surface of each of the grip plates so that the columnar member is the axis of the support shaft. A plurality of protrusions are provided on the outer peripheral surface of each columnar member, each protrusion is extended over the entire outer periphery of each columnar member, and Since the cylindrical members are arranged at predetermined intervals in the axial direction of the columnar member, the protrusions increase the biting into the flexible sheet body as compared with the case of each columnar member alone, and the bending is further increased. The local clamping force with respect to the adhesive sheet body can be increased.

  According to the tenth aspect of the present invention, the upper-side grip plate and the lower-side grip plate are arranged on the inner surface of each of the grip plates so that the columnar member is the axis of the columnar member. A plurality of protrusions provided on the outer peripheral surface of each columnar member, each protrusion extending in the axial direction of each columnar member, and each circle Since the columnar members are arranged at predetermined intervals in the circumferential direction, the local clamping force on the flexible sheet body can only be increased by the biting of each protrusion with respect to the flexible sheet body. Each protrusion extends long in the same direction as the axial direction of the support shaft, thereby increasing the resistance of the flexible sheet body in the removal direction, and allowing the flexible sheet body to come out of the pair of gripping plates. It can be effectively prevented.

According to the eleventh aspect of the invention, the lower-side operation lever extends substantially straight, and the lower-side grip plate is provided on the inner surface of the lower-side operation lever on the front side of the link mechanism. Since the front end surface of the fixed lower operation lever is inclined so as to be retracted from the inner surface to the outer surface of the lower operation lever, the lower operation lever is If the operating lever arranged on the upper side is swung in the direction where the pair of gripping plates are in the open state while lowered to the construction surface, the front end surface of the inclined upper operating lever abuts the construction surface and Since the apparatus is restricted from moving to the front side, the opening operation of the pair of gripping plates (the gripping release operation of the flexible sheet body) can be performed only by the operation of the operation lever disposed on the upper side.
In addition, in this case, the gripping plate disposed on the lower side is inclined so that the front end side is positioned below the rear end side, so that the flexible sheet body can be easily pulled out of the pair of gripping plates. It will be possible. Furthermore, as the upper operation lever swings, the lower operation lever rises and it becomes easier to hold the lower operation lever. The grip release operation can be performed reliably.
Further, in this case, the range of opening operation of the upper-side operation lever can be expanded as compared with the lifting state, and the open state of the pair of gripping plates is coupled with the inclined state of the lower-side gripping plate. It can be taken big. For this reason, the operation | work which takes in a flexible sheet | seat body between a pair of holding | grip board can also be performed easily.

  According to the twelfth aspect of the present invention, the gripping device is attached to the structure, and when the gripping device holds the flexible sheet body, the lifting and conveying tool grips the peripheral portion of the flexible sheet body. The gripping device is mechanically linked to the pair of gripping plates and sandwiches the pair of gripping plates based on the operation of the pair of gripping plates for sandwiching the peripheral edge of the flexible sheet member. An open / close mechanism that opens and closes, and is linked to the open / close mechanism, and when in the lifted state, the open / close mechanism and the pair of gripping plates act as operating forces on the open / close mechanism to close the pair of gripping plates Therefore, the lifting and conveying tool using the gripping device according to the first aspect can be provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 12 show a first embodiment. In the first embodiment, reference numeral 1 denotes a lifting and conveying tool, and the lifting and conveying tool 1 includes a structure 2 and a plurality of gripping devices 3 attached to the structure 2.

  In the present embodiment, as shown in FIG. 1, the structure 2 is integrated so that the first structure material 4 that extends straight and the both ends of the first structure material 4 face each other while maintaining a horizontal state. And a pair of second structural members 5. The length of the first structural member 4 in the longitudinal direction is determined in consideration of the length of a civil engineering unit to be lifted and transported (a member having a massive member attached to the surface of the flexible sheet S). The strength corresponding to the length in the longitudinal direction, particularly the bending strength, is ensured. Each of the second structural members 5 also has a shape that extends straight, and a semi-ring-shaped connector 6 is attached to the upper surface of each of the second structural members 5 at both longitudinal ends. Each connecting tool 6 is connected to a crane (not shown) via a chain 7, and the structure 2 is lifted via the chain 7 by the crane. On the other hand, a plurality of chains 8 are attached to the lower surface side of each second structural member 5. Each chain 8 is suspended in the second structural member 5 at predetermined intervals in the longitudinal direction, and the gripping device 3 is attached to the lower end of each chain 8.

  As shown in FIG. 2, each gripping device 3 includes a pair of gripping plates 13, 31, an opening / closing mechanism U <b> 1, and an operating force transmission mechanism U <b> 2, which are mechanically linked and integrated. Has been.

  As shown in FIGS. 2 to 5, the pair of gripping plates 13 and 31 are arranged vertically on the front side of the gripping device 3 so as to sandwich the peripheral edge of the flexible sheet S of the civil engineering unit. ing. The pair of gripping plates 13 and 31, the lower-side gripping plate 13 and the upper-side gripping plate 31, are moved toward and away from each other by the opening / closing mechanism U <b> 1. Based on this, the pair of gripping plates 13 and 31 are to be opened and closed. A plurality of cylindrical members Sd are provided on the inner surface of the lower-side gripping plate 13, and a plurality of columnar members Su are provided on the inner surface of the upper-side gripping plate 31. In the present embodiment, two cylindrical members Sd are formed on the inner surface of the lower-side gripping plate 13, and the respective axial directions thereof are orthogonal to the front-rear direction of the gripping plate 13 (the left-right direction in FIGS. 2 and 4). The two columnar members Sd are fixed in the front-rear direction on the inner side in the front-rear direction of the gripping plate 13 by a predetermined distance in the front-rear direction. Two cylindrical members Sd of the gripping plate 13 are denoted by reference numerals Sd1 and Sd2 in order from the rear end side to the front end side of the gripping plate 13. Three cylindrical members Su are fixed to the inner surface of the grip plate 31 disposed on the upper side by welding or the like in a state in which the respective axial directions are orthogonal to the front-rear direction of the grip plate 31. The columnar members Su are arranged on both sides in the front-rear direction and the center in the front-rear direction of the gripping plate 31, and the adjacent columnar members Su are separated from each other. The three cylindrical members Su of the upper-side gripping plate 31 are denoted by reference numerals Su1, Su2, and Su3 in order from the rear end side to the front end side of the gripping plate.

  Moreover, in this embodiment, as shown in FIG.3, FIG.5, FIG.6, the flexible sheet | seat body S which is a holding | grip target object is shown in the outer peripheral surface of each cylindrical member Su1, Su2, Su3 (Sd1, Sd2). A plurality of protrusions 32 are formed in order to increase the holding area. Each protrusion 32 is formed over the entire circumference of the cylindrical members Su1, Su2, Su3 (Sd1, Sd2) with a slight protruding state, and the respective protrusions 32 are spaced at a constant interval in the axial direction of the cylindrical member. It is arranged for each. As shown in FIG. 6, each cylindrical member Su1, Su2, Su3 (Sd1, Sd2) has a position where each projection 32 is displaced in the axial direction of the cylindrical member in relation to the adjacent cylindrical member. Among these, in particular, regarding the relationship between the columnar members Su1 and Sd1, the columnar member Su1 is rubbed against the columnar member Sd1 (details will be described later). The protrusion 32 of the columnar member Su1 (or Sd2) rubs the surface of the other cylindrical member Sd2 (or Su2) between the adjacent protrusions 32 of the other columnar member Sd2 (or Su2). .

  As shown in FIGS. 2 to 5, the opening / closing mechanism U <b> 1 includes a pair of operating levers 9, 10 for performing an opening / closing operation on the pair of gripping plates 13, 31, and operations of the pair of operating levers 9, 10. Is provided to the pair of gripping plates 13 and 31 as an opening / closing movement.

As shown in FIGS. 3 and 4, the pair of actuating levers 9 and 10 are disposed so as to be separated in the vertical direction. Of these, the lower-side actuating lever 9 has a shape that extends straight, and the extending direction is substantially the same as the front-rear direction of the gripping device 3. The lower-side operation lever 9 is formed in a columnar shape on the rear end side in the extending direction, and a portion on the front end side with respect to the columnar portion has a strip shape with the plate surface facing sideways. It is formed in an extending shape. The lower-side operation lever 9 is covered with a covering material such as rubber or resin at the rear end side of the cylindrical portion to form a handle portion 12. The lower-side holding plate 13 is fixed to the inner surface (the upper surface in FIG. 4) of the front end. Moreover, the front end surface of the lower-side operation lever 9 is formed as an inclined surface 11, and the inclined surface 11 extends from the inner surface side (upper side in FIG. 4) of the lower-side operation lever 9 to the outer surface side. It is inclined so as to retract toward the rear end side of the operating lever 9 arranged at the lower side as it goes to the lower side in FIG.
Further, an upright plate 14 is integrated as a constituent member of a link mechanism 21 described later between the grip plate 13 and the handle portion 12 on the inner surface side of the lower operation lever 9. The upright plate 14 is erected with its plate surface directed in the same direction as the plate surface on the front end side of the operation lever 9 disposed on the lower side, and the rising end portion of the upright plate 14 has two connecting portions. 15 and 16 are formed. The two connecting portions 15 and 16 are positioned in the up-and-down direction of the upright plate 14 so as to be separated in the front-rear direction, and both the connecting portions 15 and 16 are more than the other portions of the upstanding end portion. It is supposed to protrude high. In addition, the code | symbol 41 is a fastener for attaching the standing board 14 to the action lever 9 of lower arrangement | positioning.

  Of the pair of actuating levers 9 and 10, the actuating lever 10 arranged on the upper side, as shown in FIGS. 3 to 5, basically has a shape that extends substantially straight using a band material, Although extending slightly up and down, the extending direction is directed to the front-rear direction of the gripping device 3. The extension direction rear side portion 17 of the operation lever 10 arranged at the upper side is separated from the operation lever 9 arranged at the lower side as compared with the extension direction front side portion 18, and the extension direction rear side portion thereof. The handle portion 19 is formed by covering with a covering material such as rubber or resin. The extension direction front side portion 18 of the upper-side actuating lever 10 is slightly bent outward with respect to the extension direction rear side portion 17, and the portion 18 functions as a constituent member of a link mechanism 21 described later. Therefore, it is located on the upper side of the upright plate 14 in the operation lever 9 arranged at the lower side.

  Further, as shown in FIG. 4, the operating lever 10 arranged at the upper side has first and second outer edges 20 a and 20 b having different angles as an outer edge 20 (upper edge in FIG. 4). The first and second outer edges 20a and 20b are continuously formed toward the handle portion 19, and the second outer edge 20b is inclined so as to rise up with respect to the first outer edge 20a.

  As shown in FIGS. 3 and 4, the link mechanism 21 includes a front side portion 18 in the extending direction of the operating lever 10 arranged on the upper side, an upright plate 14 on the operating lever 9 arranged on the lower side, a link member 22, and the like. The link member 23 constitutes a four-bar link. The link member 22 has a shape extending straight, and one end portion thereof is rotatably supported by the connecting portion 15 of the upright plate 14 via a rotating shaft 24, and the other end portion is an operating lever arranged on the upper side. 10 is rotatably connected to a front side portion 18 in the extending direction via a rotary shaft 25. In the present embodiment, the link member 22 is a pair of link members 22, and the pair of link members 22 extends in the extending direction front side portion 18 and the connecting portion 15 of the upright plate 14 in the operation lever 10 arranged on the upper side. It is the arrangement which pinches.

  On the other hand, as shown in FIGS. 3 and 4, the link member 23 is bent and formed in a substantially L shape (substantially right-angled shape), and an end portion on one side thereof is connected to the connecting portion 16 of the upright plate 14. The link member 23 is rotatably supported via a rotating shaft 26, and a bent portion of the link member 23 can be rotated via a rotating shaft 27 to the outer end portion of the front side portion 18 in the extending direction of the operating lever 10 disposed on the upper side. Has been. As a result, the other side of the link member 23 extends outward from the front side portion 18 in the extending direction of the operating lever 10 disposed on the upper side. In the present embodiment, a pair of link members 23 is also used for the link member 23, and one side of the pair of link members 23 is the outer end of the front side portion 18 in the extending direction of the operating lever 10 disposed on the upper side. It arrange | positions so that the connection part 16 of a part and the standing board 14 may be clamped. The other side of the pair of link members 23 is connected by a connecting portion 28.

  On the other side of the link member 23, the grip plate 31 arranged on the upper side is attached via a connecting shaft 29. Specifically, the connecting shaft 29 is penetrated between the pair of link members 23 so that the amount of protrusion can be adjusted, and a pair of nuts 30 screwed into the connecting shaft 29 connect the pair of link members 23. The holding plate 31 is clamped in the width direction (vertical direction in FIG. 4), and the holding plate 31 is welded to the protruding end portion of the connecting shaft 29 on the side where the holding plate 13 disposed below is present. It is fixed. As a result, the upper gripping plate 31 is disposed above the lower gripping plate 13, and the swinging operation of the pair of operating levers 9 and 10 and the swinging operation are transmitted as opening / closing motions. Based on the link mechanism 21, the upper-side grip plate 31 and the lower-side grip plate 13 approach and separate (open / close) to clamp (hold) the flexible sheet body S. .

The operation of the series of mechanisms will be specifically described with reference to the arrows shown in FIG.
If the operating lever 10 arranged at the upper side is swung so that the handle portion 19 approaches the handle portion 12 of the operating lever 9 arranged at the lower side, the link member 22 is counterclockwise in FIG. Therefore, the extending direction front side portion 18 of the upper-side operating lever 10 is displaced toward the front side. As a result, the link member 23 rotates counterclockwise in FIG. 4 around its one end (rotary shaft 26). The two gripping plates 31 and 13 are close to each other with the two plate surfaces facing each other. On the contrary, if the operation lever 10 arranged on the upper side is swung so that the handle portion 19 is separated from the handle portion 12 of the operation lever 9 arranged on the lower side, the operation opposite to the above is performed. The upper arrangement gripping plate 31 is separated from the lower arrangement gripping plate 13.

  In the present embodiment, as described above, the cylindrical members Su1, Su2, Su3 are provided on the inner surface of the upper gripping plate 31, and the cylindrical members Sd1, S3 are provided on the inner surface of the lower gripping plate 13. Although Sd2 is provided, these are basically in a relationship (arrangement) that does not interfere with the approach and separation of the pair of gripping plates 13 and 31 described above. However, a fixed relationship is set for the columnar member Su1 of the gripping plate 31 and the columnar member Sd1 of the gripping plate 13 from the viewpoint of improving workability and the like. This will be specifically described with reference to FIGS.

  When the gripping plates 31 and 13 are in the open state, the cylindrical members Su1, Su2, Su3 of the gripping plate 31 and the Sd1, Sd2 of the gripping plate 13 are separated from each other (see FIG. 7). When the gripping plates 31 and 13 are in the closed state, the columnar members Su1, Sd1, sequentially from the rear end side (right end in the drawing) to the front end side (left end side in the drawing) of the gripping plate 31 (13). Su2, Sd2, and Su3 are arranged with a slight gap between adjacent cylindrical members (see FIG. 9). Thus, when the gripping plates 31 and 13 are in the open state, the flexible sheet body S that is a gripping (clamping) object is taken in between the both 31 and 13 and the gripping plates 31 and 13 are closed. The shaped object S is guided by the respective columnar members Su1, Sd1, Su2, Sd2, Su3 and has a bellows shape, and each columnar member Su1 (Sd1, Su2, Sd2, Su3) and its respective columnar members Su1. (Sd1, Su2, Sd2, Su3) is sandwiched between the holding plate 13 (31) on the side where it is not attached. As a result, the flexible sheet body S cannot be pulled out from between the grip plates 31 and 13 in the closed state.

In this case, in this embodiment, when the gripping plate 31 is moved closer to the gripping plate 13 from the time when the gripping plates 31 and 13 are in the open state (at a predetermined open state), first, the gripping plate 31 is used. The cylindrical member Su1 and the cylindrical member Sd1 of the gripping plate 13 are in contact with each other, and the state is maintained unless an external force is applied (see FIG. 8). From this state, when the operation of reducing the distance between the grip portions 12 and 19 of the operating levers 9 and 10 is performed, the gripping plates 31 and 13 are further moved closer to each other and the cylindrical members Su1 and Sd1 are rubbed. It becomes. This rubbing state is released by further continuing the operation of bringing the distance between the handle portion 19 of the operating lever 10 and the handle portion 12 of the operating lever 9 closer, and then by a slight displacement movement based on the further operation, The columnar member Su1 comes into contact with the inner surface of the gripping plate 13 while being rubbed.
For this reason, when gripping the flexible sheet S, after shifting from the rubbing state between the cylindrical members Su1 and Sd1 to the rubbing state between the cylindrical member Su1 and the inner surface of the gripping plate 13, the cylindrical member Su1 and the gripping member are gripped. Based on the rubbing relationship with the inner surface of the plate 13, at least the flexible sheet body S can be reliably held (held) by the local clamping force between the cylindrical member Su1 and the inner surface of the holding plate 13, The state can be easily maintained by using the rubbing relationship between the columnar members Su1 and Sd1 as a kind of stopper (resistance) (the pair of gripping plates 13, 31 cannot be easily opened). become. In the present embodiment, with respect to the columnar members Su2, Su3, Sd1, Sd2 other than the columnar member Su1, a slight gap is made with respect to the grip plate 13 or 31 on the side where the respective columnar members are not attached. However, in the above state, the flexible sheet body S can be locally gripped (held) by the cylindrical members Su2 and Su3 and the inner surface of the gripping plate 13, and the cylindrical members Sd1 and Sd2 and the gripping plate 31. Is set to

  At this time, the relationship in which the cylindrical members Su1 and Sd1 are rubbed is also used to obtain a sense of moderation. When the rubbing relationship between the columnar members Su1 and Sd1 is passed, a sense of moderation can be obtained at that time, and when the sense of moderation is obtained when the pair of gripping plates 13 and 31 are closed, the gripping is performed. If it can be recognized that a predetermined stage for the work has been performed and the moderation feeling is obtained when the pair of gripping plates 13 and 31 are opened, it can be recognized that the gripping work has been released.

  When the lifting force is lifted, the operating force transmission mechanism U2 causes the weights of the pair of gripping plates 13, 31 and the opening / closing mechanism U1 to act on the opening / closing mechanism U1 to close the pair of gripping plates 33. And a support shaft 34 and a restriction shaft 36 as a restriction member.

  The pair of belt-like support plates 33 are disposed so as to extend in the vertical direction with the operation lever 10, the upright plate 14, and the like arranged on the upper side interposed therebetween. The upper ends of the support plates 33 are connected by a support shaft 35 so as to be an attachment portion for the lifting and conveying tool 1, and the chain 8 hanging from the lifting and conveying tool 1 is shackled to the supporting shaft 35. It connects via the connection tools 37, such as.

  As shown in FIGS. 3 to 5, the support shaft 34 penetrates the upright plate 14 so that the gripping device 3 can be lifted, and both ends of the support shaft 34 are connected to the pair of support plates. Both lower ends of 33 are also connected. In this case, the upright plate 14 and the pair of support plates 33 are rotatable via the support shaft 34, and as an aspect thereof, both ends of the support shaft 34 are fixed to the lower ends of the pair of support plates 33. Above, a mode in which the upright plate 14 is rotatably passed through the support shaft 34, and the support shaft 33 is passed through the upright plate 14 in a non-rotatable manner, and the support plate 33 is inserted into both ends of the support shaft 34. Either or both of the rotatably supporting modes are adopted.

The position of the support shaft 34 is determined based on the weight of the pair of grip plates 13 and 31 and the opening / closing mechanism U1 when the grip device 3 is lifted via the support plate 33. The plates 13 and 31 and the opening / closing mechanism U1 are arranged (set) so as to apply turning power.
That is, with respect to the gripping device 3, when the gripping device 3 is placed on a horizontal plane, the load W1 on the front side of the support shaft 34 (the side on which the pair of gripping plates 13, 31 and the like are present) is supported. When the gripping device 3 is lifted from the state where the lower-side operation lever 9 is placed in a horizontal state, the pair of gripping plates is significantly heavier than the load W2 on the rear side of the shaft 34. The front portions such as 13, 31 are set to rotate counterclockwise in FIG. 4 around the support shaft 34 based on the load.

As shown in FIGS. 3, 4, and 10, the restriction shaft 36 connects the pair of support plates 33 on the inner side in the extending direction of the pair of support plates 33. The restriction shaft 36 is positioned on the upper end side of the upper-side operation lever 10 passing between the pair of support plates 33, and the position is an operation lever in a direction to open the pair of gripping plates 13 and 31. It faces 10 rocking regions. For this reason, as described above, even when the gripping device 3 is rotated counterclockwise in FIG. 4 around the connecting pin 34 during lifting, the outer edge 20 of the upper operating lever 10 is placed on the restriction shaft 36. In contact with each other, the pair of gripping plates 13 and 31 and the opening / closing mechanism U1 are restricted from further rotation in a predetermined posture state. This is because when the gripping device 3 is lifted in the closed state of the pair of gripping plates 13, 31, the turning force to be further rotated acts on the regulating shaft 36, and as a reaction, the pair of operating levers 9 , 10, a force to bring the grip portions 12, 19 closer to each other is applied to increase the clamping force between the pair of gripping plates 13, 31. Therefore, under this configuration, only the gripping device 3 is lifted with the peripheral edge of the flexible sheet body S sandwiched between the pair of gripping plates 13 and 31, and the load on the flexible sheet body S side is reduced. In a state where it still does not work (an initial lifting state), the load of the pair of gripping plates 13 and 31 and the opening / closing mechanism U1 of the gripping device 3 is used as a rotational force, and the pair of the flexible sheet body S with respect to the rotational force is used. The clamping force of the grip plates 13 and 31 is ensured. And after that, when it is further lifted and the load W on the flexible sheet body S also acts as a lifting load, the rotational force increases accordingly, and the gripping force between the gripping plates 31 and 13 is As the load W is increased, the weight is increased and the heavy object is accurately gripped.
Of course, in this lifted state, the load of the pair of holding plates 13 and 31 and the opening / closing mechanism U1, and further the load of the lifted transported material acts on the support plate 34, and the chain 8 and the support plate 3 are in a tensioned state. Therefore, even if the rotational force acts on the restriction shaft 36 via the operating lever 10, the position of the restriction shaft 36 does not change and the posture of the gripping device 3 does not change.

Further, in the present embodiment, paying attention to the fact that the contact position of the operating lever 10 disposed on the upper side with respect to the regulating shaft 36 differs between the open state and the closed state of the pair of grip plates 13, 31. , 31 is shifted from the open state to the closed state so as to reduce the rotational power as much as possible.
That is, when the pair of gripping plates 13 and 31 are shifted from the open state to the closed state, the extending direction front side portion 18 of the operating lever 10 disposed on the upper side rotates in the clockwise direction in FIG. In this case, the second outer edge 20b is brought into contact with the restriction shaft 36 because the contact point of the restriction shaft 36 with respect to the upper operation lever 10 moves backward in the extending direction of the upper operation lever 10. The displacement amount is shortened as much as possible, the displacement amount (moment arm) of the load point of the load W on the front side of the support shaft 34 is ensured as long as possible, and the gripping device 3 is rotated counterclockwise in FIG. The rotation power to be reduced is prevented from being reduced as much as possible. As a result, as described above, the operating lever 10 disposed on the upper side is pressed against the regulating shaft 36 based on the rotational force, and as a reaction, the handle portions 12 and 19 are brought close to each other to the pair of operating levers 9 and 10. A force to be applied will be exerted, and a decrease in the gripping force of the gripping plates 31 and 13 will be suppressed. In this respect, when the first and second outer edges are straightened with 20a and 20b being straight and the first outer edge being 20a (refer to the phantom line in FIG. 10), the first and second outer edges are rotated by an extra L than the above case. Thus, the load point approaches a vertical line passing through the support shaft 34 in the horizontal direction, and the turning force that presses the operating lever 10 disposed on the upper side against the restriction shaft 36 decreases, and the pair of gripping plates 31 and 13 The gripping force is reduced as compared with the above case.

Next, the case where a civil engineering structure unit is conveyed using the lifting conveyance tool 1 which suspended such a holding | gripping apparatus 3 is demonstrated concretely.
Here, the civil engineering structure unit as a lifted transported object has a structure in which a plurality of block members such as blocks and natural stones are attached to a flexible sheet body such as a resin net. The sheet S is a gripping object by the gripping device 3.

  First, using a crane, the lifting and conveying tool 1 is moved to the storage location of the civil engineering structure unit, and the lifting and conveying tool 1 grips the flexible sheet body S of the civil engineering structure using the gripping device 3. It is lowered to a height that can be used.

  At this time, as shown in FIG. 11, the gripping device 3 is normally in a state where the gripping plates 31 and 13 are open, but the cylindrical members Su1 and Sd1 are in contact with each other, The peripheral portion of the flexible sheet body S cannot pass between the columnar members Su1 and Sd1. For this reason, in such a case, the handle portion 12 of the operation lever 9 disposed on the lower side is grasped and swung downward about the connecting pin 34. As a result, the entire gripping device 3 swings in the same direction, and the operating lever 10 disposed on the upper side is separated from the regulating shaft 36. Using this separation distance, while grasping the handle portion 12 of the lower operation lever 9, the handle portion 19 of the upper operation lever 10 is grasped to move the handle portion 19 of the upper operation lever 10 upward. If it is swung (actuating the handle portions 19 and 12 apart from each other), the gripping plate 31 is further opened with respect to the gripping plate 13, and the space between the columnar members Su1 and Sd1 is opened. . Thereby, the holding device 3 is moved while maintaining the state, and the peripheral edge portion of the flexible sheet body S passes between the columnar members Su1 and Sd1 to the back.

Next, while gripping the handle portions 12 and 19 of both the operating levers 9 and 10, the both levers 12 and 19 are swung so as to approach each other. As a result, as shown in FIG. 10, the cylindrical members Su1, Sd1, Su2, Sd2, and Su3 are arranged between the pair of gripping plates 31 and 13 in the front-rear direction of the gripping plate 31 (13). The flexible sheet body S is guided by each columnar member Su1 (Sd1, Su2, Sd2, Su3) and takes a bellows-like form, and the flexible sheet body S is formed by each columnar member. With a local clamping force between Su1 (Sd1, Su2, Sd2, Su3) and the gripping plate 13 (31) on the side where each cylindrical member Su1 (Sd1, Su2, Sd2, Su3) is not fixed It will be clamped firmly.
In this case, since the cylindrical members Su1 and Sd1 sometimes move while rubbing when reaching the gripping state, it can be recognized that the order of reaching the gripping state is taken with a sense of moderation at that time. At the same time, the closed gripping plates 31 and 13 can be easily prevented from opening by using the rubbing between the cylindrical members Su1 and Sd1 as a kind of stopper (resistance). For this reason, as well as the clamping state between the cylindrical member Su1 and the inner surface of the gripping plate 13, the other cylindrical members Sd1, Su2, Sd2, Su3 and the gripping plate 31 (13) on the side where the respective cylindrical members are not attached. The state of clamping with the inner surface is also maintained (temporary gripping).

Next, when the operator releases his / her hands from the handle portions 12 and 19 of the lever members 9 and 10, the pair of grip plates 13 and 31 and the opening / closing mechanism U1 are rotated around the support shaft 34, and the rotation is performed. As shown in FIG. 10, the outer edge 20 b of the operating lever 10 disposed on the upper side is regulated by abutting against the regulating shaft 36. For this reason, the rotational force that is still intended to rotate is converted into a force that brings the grip portions 12 and 19 of the two operating levers 9 and 10 closer to each other based on the reaction with respect to the restriction shaft 36, and the bending sheet S The holding state (clamping state) of the holding plates 31 and 13 is held.
At this time, the entire civil engineering structure is not yet lifted, and only the flexible sheet S is gripped, and the gripping device 3 is not subjected to the load of the civil engineering structure. For this reason, at this time, the gripping state of the flexible sheet body 3 is held only by the load of the pair of gripping plates 13 and 31 and the opening / closing mechanism U1.

  In addition, as described above, when the gripping plates 31 and 13 are changed from the open state to the closed state (gripping state), as a result, the upper operation lever 10 swings and displaces. There is a rotation amount that must be newly rotated between the outer edge 20 of the actuating lever 10 and the restriction shaft 36. As described above, the support shaft 34 is brought into contact with the restriction shaft 36 by bringing the second outer edge 20b into contact therewith. In addition, the displacement amount (moment arm) of the load point of the load W on the front side is ensured as long as possible so that the rotational force for rotating the gripping device 3 in the counterclockwise direction in FIG. 10 is not reduced as much as possible. The

  Next, when gripping of the flexible sheet body S by the gripping device 3 is finished in all the gripping devices 3 as described above, the lifting and conveying tool 1 is further lifted. As a result, the load W of the civil engineering structure unit is also applied as a rotational force for rotating the gripping device 3, and accordingly, the handle portion 12 of the operation lever 9 disposed on the lower side is based on the above-described operation. And the grip portion 19 of the operating lever 10 disposed on the upper side increase in force. For this reason, the gripping force of the gripping plate 31 increases as the load W of the civil engineering structure unit, which is a lifted conveyance object, is applied. Even if the load W of the civil engineering structure unit acts, the flexible sheet body The gripping plates 31 and 13 with respect to S are accurately maintained. Thereby, the civil engineering structure unit is accurately lifted and conveyed to the installation location on the construction surface.

  When the civil engineering structure unit is lifted and conveyed to the installation location, the civil engineering construction unit is lowered to the installation location. Thereafter, when the grip portions 12 and 19 of the pair of lever members 9 and 10 are pushed away in a direction away from each other, the grip plates 31 and 13 are also opened, and the grip of the flexible sheet S of the civil engineering unit is released. The When the pair of gripping plates 31 and 13 are opened, the cylindrical members Su1 and Sd1 are temporarily rubbed, but the grip release state can be recognized with a sense of moderation that occurs at that time.

  Further, as the civil engineering structure unit is lowered onto the construction surface, the gripping device 3 may be lowered onto the construction surface. In this case, as shown in FIG. Holding the part 19, the gripping device 3 is tilted forward, and the inclined surface 11 of the lower operation lever 9 is brought into contact with the construction surface 40. In this state, if the handle portion 19 of the operating lever 10 disposed on the upper side is further swung upward, the pair of grip plates 31 and 13 are opened, and the grip on the flexible sheet body S is released. In this case, since the inner surface of the gripping plate 13 is inclined toward the front side, the flexible sheet body S is moved by moving the gripping device 3 backward while maintaining the state. It can be easily pulled out from between the pair of gripping plates 31 and 13. Of course, in this case, as the handle portion 19 of the upper-side operation lever 10 is swung upward, the handle portion 12 of the lower-side operation lever 9 is separated from the construction surface 40 and becomes easy to grip. By grasping and operating the handle portion 12, the release operation of the flexible sheet body S can be reliably performed. In this way, when the grip release operation is completed in all the gripping devices 3, the lifting and transporting tool 1 is returned to the storage location for the civil engineering structure in order to transport the next civil engineering structure unit.

  As shown in FIG. 12, in the state where the inclined surface 11 of the lower operation lever 9 is placed on the construction surface 11, the support plate 33 is not lifted, and the support plate 33 moves the support shaft 34. Since the upper lever 10 can be pivoted counterclockwise in FIG. 12, the gripping plate 31 can be made larger than the gripping plate 13. Will be able to open. For this reason, if this state is utilized also when holding the flexible sheet body S of a civil engineering structure, the flexible sheet body S can be easily taken in between the pair of holding plates 31 and 13. become.

  Therefore, if the lifting and conveying tool 1 provided with such a gripping device 3 is used, the flexible sheet body S is held with the pair of gripping plates 13 and 31 at the time of lifting without using a driving source such as a cylinder unit. The unit for civil engineering structure (flexible sheet S) can be lifted without specially attaching a ring-shaped hook or the like to the peripheral part of the flexible sheet S. Will be able to.

  FIG. 13 shows a second embodiment. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The second embodiment shown in FIG. 12 shows a modification of the columnar member Su (Sd). In this second embodiment, each columnar member Su (Sd) is orthogonal to the front-rear direction of the gripping plate 31 (13) on the inner surface of each gripping plate 31, 13 as in the first embodiment. The plurality of protrusions 32 on the outer peripheral surface of each columnar member Su (Sd) are extended in the axial direction of each columnar member Su (Sd). The protrusions 32 are arranged at predetermined intervals in the circumferential direction on the outer peripheral surface. For this reason, each protrusion 32 can not only increase the contact area (biting area) with the flexible sheet body S, but also has an effect based on the shape of the columnar member Su (Sd) extending in the axial direction. Therefore, a pulling resistance can be given to the flexible sheet body, and a high gripping force can be ensured also in this embodiment.

Although the embodiment has been described above, the present invention includes the following aspects.
(1) As the flexible sheet body S, in addition to the resin net, sheets such as a wire net and a non-woven fabric are also targeted.
(2) The lifting and conveying tool 1 may be of any structure as long as it has the gripping device 3.
(3) The cylindrical member Su (Sd) is provided with a texture and a protrusion.
(4) The material of the cylindrical member Su (Sd) is rubber or resin having a large friction coefficient.
(5) The cylindrical member Su (Sd) is processed so that the surface is not slippery.
(6) In the embodiment, the front end portions of the gripping plate 13 (31) are chamfered as shown in FIGS. 3 and 5, but the gripping plate 13 (31) is not chamfered. Make it rectangular or square.
(7) The gripping device 1 is preferably formed of a metal material such as an iron material because it needs to be rotated around the support shaft 34 based on its own weight (the pair of gripping plates 13, 31 and the opening / closing mechanism U1). Any material can be used as long as it can be rotated using its own weight.
(8) The gripping by the pair of gripping plates 13 and 31 includes not only a gripping mode but also a broad sense that is firmly held by the pair of gripping plates 13 and 31 so as not to move directly or indirectly. .

  It should be noted that the object of the present invention is not limited to what is explicitly described, but includes provision of what is substantially preferable or corresponding to what is described as an advantage.

The perspective view which shows the lifting conveyance tool which concerns on 1st Embodiment. The key map showing the concept of the grasping device concerning a 1st embodiment. The perspective view which shows the holding | gripping apparatus which concerns on 1st Embodiment. The partial cross section side view which shows the holding | grip apparatus which concerns on 1st Embodiment currently lifted in the state which does not hold | grip. The figure which looked at the holding | gripping apparatus which concerns on 1st Embodiment from diagonally upward. Explanatory drawing explaining the relationship of the cylindrical member attached to a pair of holding | grip board. Operation | movement explanatory drawing explaining operation | movement of a pair of holding | grip board. Operation | movement explanatory drawing following FIG. Operation | movement explanatory drawing following FIG. The partial cross section side view which shows the holding | gripping apparatus lifted in the state which hold | gripped the flexible sheet | seat body. Explanatory drawing explaining the operation | work which hold | grips a flexible sheet | seat body in the state lifted. Explanatory drawing explaining the process which cancels | releases holding | grip of a flexible sheet | seat body, or the process of hold | gripping a flexible sheet | seat body. Explanatory drawing which shows the cylindrical member which concerns on 2nd Embodiment.

DESCRIPTION OF SYMBOLS 1 Lifting conveyance tool 2 Structure 3 Gripping device 9 Lower operation lever 10 Upper operation lever (one operation lever)
DESCRIPTION OF SYMBOLS 11 Inclined surface 13 Lower arrangement | positioning grip plate 20 Outer edge in the operation lever of upper arrangement | positioning 20a 1st outer edge 20b 2nd outer edge 21 Link mechanism 31 Upper arrangement | positioning holding plate 32 Protrusion 33 Support plate 34 Support shaft 36 Restriction shaft U1 Opening / closing mechanism U2 Actuation force transmission mechanism

Claims (12)

A gripping device attached to a lifting and conveying tool,
A pair of gripping plates;
An opening / closing mechanism that is mechanically linked to the pair of gripping plates and that opens and closes the pair of gripping plates based on the operation thereof;
An operating force that is mechanically linked to the open / close mechanism and is in a lifted state, and causes the open / close mechanism and the pair of gripping plates to act on the open / close mechanism using the weight of the open / close mechanism and the pair of gripping plates as an operating force. A transmission mechanism;
With
A gripping device characterized by that. In claim 1,
When the pair of gripping plates holds the flexible sheet body on the lifting and conveying tool, the peripheral edge of the flexible sheet body is gripped.
A gripping device characterized by that. In claim 2,
The pair of gripping plates is composed of a lower-side gripping plate and an upper-side gripping plate disposed above the lower-side gripping plate,
The opening / closing mechanism is disposed between a pair of operating levers spaced apart in the vertical direction and swingable based on an operating force in the vertical direction, and the pair of operating levers and the pair of gripping plates. A link mechanism that transmits the separation and approaching movement of the pair of operating levers to the pair of gripping plates as opening and closing movements,
The operating force transmission mechanism is supported by a component of the opening / closing mechanism and is used to lift the opening / closing mechanism and the pair of gripping plates, and is supported by the support shaft and lifted above the support shaft. A support plate serving as a mounting portion for the tool, and provided on the support plate in a region of a swinging region of one of the pair of operating levers in a direction in which the pair of gripping plates are opened. And a regulating member that regulates swinging of the one operating lever by contact with the one operating lever,
The component of the link mechanism and the support plate are rotatably supported via the support shaft,
When the support shaft is lifted via the support shaft from a state in which the pair of gripping plates, the link mechanism, and the pair of actuating levers are arranged in a substantially horizontal direction, the pair of grips are centered on the support shaft. The plate, the link mechanism, and the pair of operating levers are arranged to rotate in the swinging direction of the one operating lever that opens the pair of gripping plates.
A gripping device characterized by that. In claim 3,
The one operation lever is an operation lever disposed on the upper side of the pair of operation levers,
When the support shaft is lifted via the support shaft from a state in which the pair of gripping plates, the link mechanism, and the pair of actuating levers are arranged in a substantially horizontal direction, the pair of grips are centered on the support shaft. The plate, the link mechanism, and the pair of actuating levers are rotated in a direction in which the upper actuating lever is swinging and away from the lower actuating lever of the pair of actuating levers. Arranged so that,
A gripping device characterized by that. In claim 4,
The outer edge of the operating lever arranged at the upper side is sequentially separated from the operating lever arranged at the lower side of the first outer edge and the first outer edge in order toward the outer end in the longitudinal direction of the operating lever arranged at the upper side. A second outer edge that is raised,
When the pair of gripping plates are in a closed state in a state where the pair of gripping plates, the link mechanism, and the pair of actuating levers are lifted via the support shaft, the restricting member contacts the second outer edge. Set to touch,
A gripping device characterized by that. In claim 4,
The link mechanism constitutes a four-bar link mechanism,
The operating lever of the upper arrangement and the operating lever of the lower arrangement are used as link members of the four-bar linkage mechanism,
A gripping device characterized by that. In claim 2,
One grip plate of the pair of grip plates and the other grip plate of the pair of grip plates each have a columnar member on each inner surface thereof,
The columnar member in the one gripping plate is set not to exist in the movement region of the columnar member in the other gripping plate based on the closing operation of the other gripping plate with respect to the one gripping plate,
A gripping device characterized by that. In claim 4,
The upper-side gripping plate and the lower-side gripping plate are arranged such that, on the inner surface of each gripping plate, the cylindrical member extends so that the axis of the columnar member extends in the axial direction of the support shaft. Have
The upper arranged gripping plate is set to move toward the link mechanism as it approaches the lower arranged gripping plate during the closing operation based on the operation of the pair of operating levers.
The cylindrical member in the upper-side grip plate and the cylindrical member in the lower-side grip plate are located on the side closest to the link mechanism when the both grip plates are in a predetermined open state. Is set so that the approaching movement of both gripping plates is restricted unless an external force of a predetermined level or more is applied.
A gripping device characterized by that. In claim 3,
The upper-side gripping plate and the lower-side gripping plate are arranged such that, on the inner surface of each gripping plate, the cylindrical member extends so that the axis of the columnar member extends in the axial direction of the support shaft. Have
A plurality of protrusions are provided on the outer peripheral surface of each columnar member,
The protrusions are extended over the entire outer periphery of each columnar member, and are arranged at predetermined intervals in the axial direction of the columnar member.
A gripping device characterized by that. In claim 3,
The upper-side gripping plate and the lower-side gripping plate are arranged such that, on the inner surface of each gripping plate, the cylindrical member extends so that the axis of the columnar member extends in the axial direction of the support shaft. Have
A plurality of protrusions are provided on the outer peripheral surface of each columnar member,
The protrusions extend in the axial direction of the columnar members and are arranged at predetermined intervals in the circumferential direction of the columnar members.
A gripping device characterized by that. In claim 6,
The lower-side operating lever extends substantially straight, and the lower-side holding plate is fixed to the inner surface of the lower-side operating lever on the front side of the link mechanism.
The front end surface of the lower-side operation lever is inclined so as to retract toward the rear side from the inner surface side to the outer surface side of the lower-side operation lever.
A gripping device characterized by that. A gripping device is attached to the structure, and when the gripping device holds the flexible sheet body, the lifting device grips the peripheral edge of the flexible sheet body,
The gripping device opens and closes a pair of gripping plates that are mechanically linked to the pair of gripping plates and opens and closes the pair of gripping plates based on the operation of the gripping plate. And an operating force linked to the opening / closing mechanism and in a lifted state, causing the opening / closing mechanism and the pair of gripping plates to act on the opening / closing mechanism using the weight of the opening / closing mechanism and the pair of gripping plates as an operating force. A transmission mechanism;
A lifting carrier characterized by that.

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