JP2006193235A - Hoisting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hoisting device secured in safety when using and capable of reducing a burden to be applied to a worker. <P>SOLUTION: This hoisting device is provided with; a pinching unit 3, which is provided with a pair of pinching bodies 10 provided with abutting members 7 respectively having a slip preventing means in a surface thereof, support members 8 provided with the abutting members 7 installed in them and arms 9 extended from the support member 8, and a first frame 11 for turnably connecting the pair of pinching bodies 10; a holding part 4 provided over the pinching unit 3; a suspension unit 6 for connecting the pinching unit 3 to the holding part 4; and a releasing means 5, which is provided with a second frame 12 for connecting the pair of pinching bodies 10, a lever 15 fitted to the holding part 4, a tube 16 for connecting the lever 15 to the second frame 12, and a wire 17 inserted into the tube 16 to connect the lever 15 to the first frame 11 and capable of pulling the first frame to come close with operation of the lever 15. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lifting device, and more particularly to a lifting device for lifting a heavy object.

  2. Description of the Related Art Conventionally, in order to carry or install heavy objects such as concrete secondary products such as gutter lids and blocks, lifting devices that sandwich and lift heavy objects have been used.

  And as such a lifting device, it intersects in the shape of an abbreviated X character, and a pair of arms which pivotally supported this intersection, and a suspension lower part provided above each pair of arms, and each pair of arms And a pair of abutting portions that abut against a heavy object. In this case, the operator supports the suspended lower part and suspends the pair of arms, whereby the pair of crossed arms extends in the vertical direction, and the pair of contact parts are brought close to each other. And when making a pair of contact part adjoin, a heavy article can be pinched and suspended by positioning a heavy article between this pair of contact parts.

Japanese Patent Laid-Open No. 09-301672

  However, in the case of the conventional lifting device, the pair of contact portions is generally formed of a metal material. In this case, the friction generated between the heavy object and each of the pair of contact portions. There was little force, and the weight of the lifted heavy object could fall from the clamping part by its own weight.

  Further, as described above, in the case of the conventional lifting device, the pair of contact portions are brought close to each other by the weight of the arm and the contact portion. For this reason, when the lifting device is lifted as a single unit, the lifting device is brought closer to the width of the heavy load to be lifted. In this state, the heavy load cannot be clamped. Therefore, in order to position a heavy object between the pair of contact portions, it is necessary for the operator to bend the waist each time and directly support the contact portions to separate the pair of contact portions. . Furthermore, when installing a heavy object that is sandwiched and lifted at a desired location, in order to release the heavy object from the contact part, the operator supports the contact part directly by bending his / her waist or the like. It was necessary to separate the pair of contact portions. This work is very time consuming and places a burden on the operator's waist and the like, which is a heavy burden on the worker.

  Then, in view of the said situation, this invention makes it a subject to provide the lifting device which can be used safely and can reduce an operator's burden.

The means taken by the present invention to solve the above-mentioned problems are as follows:
“A contact member having anti-slip means on the surface and capable of coming into contact with a heavy object, a support member on which the contact member is detachably mounted, and substantially perpendicular to the contact member from above the support member A pair of sandwiching bodies provided with arms extending to each other, and a first frame that rotatably couples the pair of sandwiching bodies with the abutting members facing each other. A clamping part for clamping;
A grip portion that is provided above the sandwiching portion and has a substantially rod shape that is disposed such that the longitudinal direction thereof is a horizontal direction;
One end is connected to a position closer to each other than the connection position of the first frame in the pair of arms, and the other end is connected to the grip portion, and the holding portion is suspended from the grip portion. A hanging part connected in a lowered shape,
A second frame that is connected to a position closer to each other than each connection position of the first frame in the pair of arms and restricts the rotational position of the pair of clamping bodies relative to the first frame, and is attached to the grip portion Lever, a tube connecting the lever and the second frame, and being inserted into the tube, connecting the lever and the first frame, and operating the lever to connect the second frame to the first frame And a releasing means for displacing the pair of holding members from a holding position for holding the heavy load to a release position for releasing the heavy load. Characteristic lifting device "
It is.

  Here, as a heavy article, concrete products, such as a lid and a block of a side groove, etc. are mentioned, for example.

  In the lifting device having the above-described configuration, the pair of sandwiching bodies are rotatably connected by the first frame, and positions closer to each other than the connection position are connected to the grip portion via the suspension portion. . Thereby, when a clamping part is suspended, a clamping body rotates in the direction which a pair of contact member adjoins centering on the connection position of a 1st frame. Therefore, according to the lifting device having the above-described configuration, the heavy object can be held and lifted by suspending the holding part while the heavy object is positioned between the pair of contact members. In addition, since the clamping force which a pair of clamping body clamps a heavy article generate | occur | produces with the dead weight of a heavy article, it shows a strong clamping force, so that a heavy article with a heavy weight is clamped.

  Moreover, as a position which connects the suspension part in an arm, it is suitable to have spaced apart largely from the connection position of a 1st frame. Thus, the distance between the fulcrum (that is, the rotation center of each clamping body) and the point of action (that is, the contact position with the side surface of the heavy object) between the fulcrum and the force point (that is, the connection position of the suspended portion). The weight ratio can be increased and a heavy object can be clamped with a stronger clamping force.

  Further, in the lifting device having the above-described configuration, the range in which the clamping body rotates is restricted by the second frame that connects the pair of arms. On the other hand, as described above, in a state in which the sandwiching portion is suspended, the sandwiching body rotates in the direction in which the pair of contact members approach each other around the connection position of the first frame. At this time, the pair of sandwiching bodies rotate to a predetermined rotation position regulated by the second frame. And the 1st frame and 2nd frame which connect a pair of clamping body by two different points will be in the state mutually separated.

  Furthermore, the lever and the second frame installed in the grip portion are connected by a tube, and the lever and the first frame are connected by a wire that passes through the tube. For this reason, when the wire is pulled by holding the lever, the second frame is brought close to the first frame. As a result, the sandwiching body rotates in a direction in which the pair of contact members are separated from each other about the connection position of the first frame. Thus, by operating the lever mounted on the gripping portion, the holding body releases the heavy load from the position holding the heavy load (hereinafter referred to as the holding position) (hereinafter referred to as the release position). And can be displaced. Therefore, according to the lifting device having the above-described configuration, it is possible to omit the operation of directly displacing the sandwiched body to the release position by bending the waist of the operator, so that the burden on the operator can be reduced. .

  Furthermore, in the lifting device having the above-described configuration, the anti-slip means is provided on the contact surface that contacts the side surface of the heavy object. Thereby, when a heavy object is clamped, a strong frictional force can be generated between the contact member and the heavy object, and the heavy object can be accurately clamped. Therefore, according to the lifting device having the above-described configuration, the lifted heavy object can be prevented from falling off from the holding portion due to its own weight, and thus can be used safely. Examples of the anti-slip means include, for example, using a member having a roughened surface or a member containing a rubber component at a contact portion of the contact member with a heavy object.

  Here, in the lifting device, the contact member that contacts and supports the heavy object may be particularly deteriorated. As described above, when the non-slip means is provided on the abutting surface, it is desirable that the degree of deterioration of the abutting member is always kept low in order to achieve a high anti-slip effect. . However, replacing the entire lifting device every time the abutting member deteriorates may cause an increase in cost.

  In the lifting device configured as described above, the contact member is detachably attached to the support member. Thereby, when a contact member deteriorates, this contact member can be removed from a support member, and can be replaced | exchanged for a new contact member. Therefore, according to the lifting device having the above-described configuration, it is possible to always provide a high anti-slip effect at a low cost.

In the above lifting device,
"The contact member is
A base material having a protruding portion that is formed of a hard member and is formed so that the thickness dimension decreases from the upper part toward the lower part and protrudes downward on the lower surface;
The non-slip means is
Formed with a material containing a rubber component and formed with a substantially uniform thickness dimension, comprising a rubber material installed on the surface of the base material,
The support member is
A back support portion for supporting a back surface on the base material side of the contact member;
A lower surface support portion that has a groove portion that can be inserted through the protruding portion and that penetrates in the width direction, and that supports the lower surface of the contact member so as to be slidable in the width direction;
The contact surface of the contact member with the heavy object is
When the clamping body is in the clamping position, it is substantially parallel to the side surface of the heavy object,
When the clamping body is in the release position, the lifting device is inclined in a direction away from the upper side to the lower side with respect to the side surface.
It can also be.

  In the lifting device having the above-described configuration, the abutting surface is substantially parallel to the side surface of the heavy object in the clamping body at the clamping position. Thereby, since the contact surface makes surface contact with the side surface of the heavy object, a large contact area with the side surface of the heavy object is ensured. Therefore, the sandwiched state can be maintained satisfactorily.

  On the other hand, in the holding body displaced to the release position by the release means described above, the contact surface is inclined in a direction away from the upper side to the lower side with respect to the side surface of the heavy object. Thereby, a pair of contact member will be in the state expanded below. Therefore, when the heavy object to be clamped is positioned between the pair of contact members, the heavy object is moved between the pair of contact members by lowering the heavy object from above with the clamp body displaced to the release position. It can be easily inserted.

  By the way, when the support member is configured to support only the back surface on the base material side of the contact member, the contact member to which a downward force is applied by the sandwiched heavy object may fall out of the support member. It is done.

  On the other hand, in the lifting device configured as described above, the contact member includes a base material formed of a hard plate material and a rubber material formed of a material including a rubber component installed on the base material. ing. In addition, the support member is formed with a back surface support portion that contacts the back surface on the base material side and a bottom surface support portion that supports the bottom surface of the base material. Thereby, the supporting member supports the contact member by supporting the lower surface and the side surface of the hard base material. As a result, the support member favorably limits the downward movement of the contact member relative to the support member. Therefore, according to the lifting device having the above configuration, it is possible to accurately prevent the contact member from falling off the support member. In addition, as a hard board | plate material, a metal board | plate material or a synthetic resin board | plate material etc. are mentioned, for example.

  Furthermore, in the lifting device having the above configuration, the base material is formed to have a thickness dimension that decreases from the upper part toward the lower part, and the rubber material is formed to have a substantially uniform thickness dimension. Is formed in a thickness dimension that decreases from the top to the bottom. That is, when the clamping body is in the clamping position, the back support portion of the support member that supports the back surface on the base material side of the contact member is inclined so that the surface that contacts the back surface on the base material side faces upward. It will be. As a result, the weight of the abutting member that acts on the support member when lifting the heavy object and the weight of the heavy object is distributed to the lower surface support part and the back surface support part, thus preventing the weight from concentrating on the lower surface support part. Is done. Therefore, according to the lifting device having the above-described configuration, the strength of the support member can be improved and the mounting state of the contact member can be accurately maintained.

  Furthermore, in the lifting device having the above-described configuration, a projecting portion that projects downward is formed at the lower end of the base material. On the other hand, the lower surface support portion of the support member is provided with a groove portion through which the protrusion portion can be fitted along the width direction. Thereby, since the contact member can slide along the width direction, the contact member can be attached and detached by sliding the support member in the width direction. Therefore, according to the lifting device having the above configuration, the contact member can be easily attached and detached.

In the above lifting device,
"The hanging part is
A swinging member installed so as to be swingable in the vicinity of an intermediate part in the longitudinal direction of the gripping part;
A connecting member detachably attached to the swing member;
A lifting device characterized in that it includes a pair of chain portions, one end of which is connected to the connecting member and the other end is connected to the pair of arms.
It can also be.

  By the way, when the gripping part and the sandwiching part are connected by a suspended part such as a single chain part, the sandwiching part may rotate in the horizontal direction around the suspended part. In this case, it may be difficult for an operator to stably use the lifting device.

  On the other hand, in the lifting device having the above-described configuration, the swinging member and the sandwiching portion are connected by two chain portions. Thereby, it becomes possible to prevent the clamping part from rotating in the horizontal direction. Therefore, according to the lifting device having the above-described configuration, the lifting device can be used stably.

  On the other hand, when the operator grips the grip portion and performs the lifting work, the grip portion may be tilted to one side. When the sandwiching portion is supported at two different points, the sandwiching portion also tilts in the same direction as the gripping portion is tilted, so that the sandwiching state becomes unstable, and there is a possibility that a heavy object falls off the sandwiching portion.

  On the other hand, in the lifting device having the above-described configuration, the swinging member constituting the suspended portion is attached to the grip portion so as to be swingable. And a pair of chain | strand part which comprises a suspension part has one end connected with a rocking | swiveling member, and the other end is connected with each of a pair of arm which comprises a clamping part. As a result, even when the grip portion is inclined, the swing member swings so as to hold the holding portion horizontally, so that the tilt can be offset. Therefore, according to the lifting device having the above-described configuration, the lifting work can always be performed in a stable clamping state.

  Further, the lifting device of the present invention can be used jointly by one worker using the gripping part by holding each end of the gripping part, in addition to being used by one worker alone. At this time, if the height difference between the two workers is large, the grip portion may be greatly inclined to one side. Also in this case, there is a possibility that the sandwiching part may tilt in the same direction as the gripping part tilts.

  In the lifting device configured as described above, each of the pair of chain portions is detachably connected to the swing member by the connecting member. Thereby, it becomes possible to set the length dimension of each chain | strand part to arbitrary dimensions by changing the connection position of the connection member in a chain | strand part. Therefore, when using the lifting device, the length of one chain portion can be changed in advance according to the height difference of the operator, and the tilting of the clamping portion caused by the inclination of the gripping portion can be offset.

  Note that the height difference can also be offset by the swing of the swing member described above. However, by changing the length of the chain portion in advance, it is possible to cope with a large height difference that is difficult to cope with only by the swing member.

  As described above, according to the present invention, by providing the non-slip means on the abutting surface that abuts on the heavy object, it is possible to accurately hold the sandwiched state, and the lifting device that can be used safely can do. Further, by detachably attaching the abutting member to the support member, the abutting member can be exchanged, and a high anti-slip effect can be obtained at a low cost. Furthermore, by providing a release means having a lever attached to the gripping part, the work of the operator to bend his / her waist, etc. to directly displace the clamping body to the release position is omitted, and the burden on the worker is reduced. be able to.

  Hereinafter, a lifting device according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5. 1 and 2 are front views showing the configuration of the lifting device, and FIGS. 3 to 5 are an enlarged perspective view, an exploded perspective view, and a front view of the main part of the clamping portion. In the present embodiment, a lifting device for lifting a side groove lid installed in a side groove as a heavy object will be described.

  As shown mainly in FIG. 1, the lifting device 1 according to the present embodiment is for holding and lifting the side groove cover 2 and is gripped by an operator (not shown) when working. It is comprised from the part 4, the clamping part 3 which clamps the side groove cover 2, the suspension part 6 which connects the holding part 4 and the clamping part 3, and the releasing means 5 which cancels | releases a clamping state.

  Next, the clamping unit 3 will be described in more detail. As shown mainly in FIG. 3, the sandwiching portion 3 includes a contact member 7, a support member 8 on which the contact member 7 is detachably mounted, and a contact member 7 above the support member 8. And a first frame 11 that rotatably connects the pair of sandwiching bodies 10 with the abutting members 7 facing each other. It is configured.

  Furthermore, as shown in FIG. 4, the arm 9 has a fitting piece 9a that can be fitted into the through hole 11a formed in the first frame 11, and the fitting piece 9a is fitted into the through hole 11a. The shaft 30 and the fixing screw 31 are attached to the first frame 11 via the fixing member 40 so as to be rotatable. Then, the fitting piece 9 a fitted into the through hole 11 a is fixed to the support member 8 via the fixing member 41 using fixing screws 32 and 33. Further, the contact state of the contact member 7 mounted on the support member 8 is fixed by a fixing screw 34. As described above, the arm 9, the support member 8, and the contact member 7 constituting the sandwiching body 10 are integrated.

  Each arm 9 is provided with a plurality of through holes 9b through which the shaft 30 can be inserted. At this time, the arm 9 is slid to a desired position along the first frame 11 with the shaft 30 removed, and the through-hole 9b is aligned with the through-hole 40a of the fixing member 40. By inserting the shaft 30 through 9b and 40a, the installation position of the holding body 10 with respect to the first frame 11 can be changed. Thereby, the interval between the pair of contact members 7 can be changed in accordance with the width dimension of the side groove lid 2.

  Further, as shown in FIG. 3, the contact member 7 is formed of a metal plate, and has a base member 13 having a protruding portion 13 a that protrudes downward on the lower surface, and a surface of the base member 13. That is, it is composed of a rubber material 14 provided with a plurality of slits 14b along the width direction on the contact surface 14a with the side groove lid 2. Here, the base material 13 is formed so that the thickness dimension decreases from the upper part to the lower part. On the other hand, the rubber material 14 is formed so that the thickness dimension is substantially uniform. Here, the rubber material 14 corresponds to the non-slip means in the present invention.

  The support member 8 includes a back surface support portion 8a that supports the side surface of the base material 13, and a bottom surface support portion 8b in which the protruding portion 13a can be fitted and a groove 8c penetrating in the width direction is formed in the width direction. It is formed. As a result, the abutting member 7 is supported such that the protruding portion 13a of the base material 13 is supported by the bottom surface of the groove 8c, and the rubber material 14 is supported by the upper surface of the lower surface supporting portion 8b. Will be limited.

  Further, the contact member 7 can be detached from the support member 8 by sliding in the width direction along the groove 8 c of the support member 8. Therefore, the contact member 7 can be easily attached and detached.

  Next, the release means 5 will be described in more detail. As shown in FIGS. 1 and 2, the releasing means 5 includes a lever 15 mounted on the grip portion 4, a second frame 12 that connects a pair of sandwiching bodies 10 connected by the first frame 11, It is mainly composed of a tube 16 that connects the lever 15 and the second frame 12 and a wire 17 that is inserted into the tube 16 and connects the lever 15 and the first frame 11.

  The lever 15 is rotatably attached to the grip portion 4 via the fixing member 18 by a shaft 37. One end of a wire 17 is connected to the lever 15, and one end of a tube 16 through which the wire 17 is inserted is fixed to a fixing member 18 by a fixing nut (not shown). Further, the other end of the tube 16 is fixed to the second frame 12 by a fixing nut 20, and the other end of the wire 17 is fixed to the first frame 11 via a locking member 21. As a result, the wire 17 is pulled by gripping the lever 15. As shown in FIGS. 1 and 2, a coil-type spring 22 that urges the first frame 11 and the second frame 12 in a direction separating the first frame 11 and the second frame 12 is a wire. It is attached in a state where 17 is inserted.

  Long holes 12a extending in the horizontal direction are respectively provided at both ends of the second frame 12, and an engagement pin 38 is fixed to the arm 9 through the long holes 12a. Therefore, the sandwiching body 10 can be rotated in a range in which the engagement pin 38 slides in the long hole 12a, and the rotation exceeding the range is regulated by the engagement pin 38. That is, when the first frame 11 and the second frame 12 are close to each other, the engagement pin 38 is located at an end portion close to each other in the long hole 12a (see FIG. 5A). When the frame 11 and the second frame 12 are separated from each other, the engagement pin 38 is located at an end portion that is separated from each other in the long hole 12a (see FIG. 5B).

  Next, the suspended portion 6 will be described in more detail. As mainly shown in FIG. 1, the suspension portion 6 includes a swing member 23 that is pivotally supported via a fixed member 42 at a middle portion in the longitudinal direction of the grip portion 4 using a shaft 39, and a swing member 6. The moving member 23 includes a pair of hooks 25 installed near both ends, and a pair of chain portions 24 having one end connected to the pair of hooks 25 and the other end connected to the pair of arms 9. Yes.

  Here, the hook 25 is connected to the chain portion 24 by engaging with any one of the plurality of rings 24 a constituting the chain portion 24. Thereby, the space | interval of the holding part 4 and the clamping part 3 can be adjusted by changing the ring 24a engaged with the hook 25. FIG. As a result, when the lifting device 1 of this embodiment is used by two workers, the height of the two workers is changed by changing the length of the other chain portion 24 relative to the one chain portion 24. Can correspond to the difference. Here, the hook 25 corresponds to the connecting member in the present invention.

  Next, the usage method of the lifting apparatus 1 of this embodiment is demonstrated. First, using the above-described method, when the distance between the pair of contact members 7 is the same as the width of the side groove cover 2, the contact surface 14a is substantially parallel to the side surface 2a of the side groove cover 2. As described above, the distance between the pair of sandwiching bodies 10 is adjusted. Furthermore, when using it by two workers, it adjusts so that the clamping part 3 may become horizontal according to the height difference of a worker.

  Next, the operator holds the holding part 4 and suspends the holding part 3. Then, the sandwiching body 10 rotates about the shaft 30 of the first frame 11 in the direction in which the pair of contact members 7 are close to each other.

  In this state, the operator holds the lever 15. Then, the wire 17 is pulled and the first frame 11 and the second frame 12 are brought close to each other. As a result, the arm 9 rotates about the shaft 30 in a direction in which the pair of contact members 7 are separated from each other, and the clamping unit 3 is in a released state (see FIG. 2).

  Then, the operator lowers the holding portion 3 so that the pair of contact members 7 are positioned at both ends of the side groove lid 2, and releases the lever 15 that has been gripped thereafter. Then, the first frame 11 and the second frame 12 are separated by the urging force of the spring 22, and accordingly, the holding body 10 is displaced to the holding position. Thereby, the side groove cover 2 is clamped by the clamping part 3. At this time, as described above, the contact surface 14a is substantially parallel to the side surface 2a of the side groove lid 2, and thus comes into surface contact with the side surface 2a. Thereby, the state which clamps the side groove cover 2 of the clamping part 3 can be hold | maintained favorably. As mainly shown in FIG. 5, the lower surface support portion 8 b of the support member 8 is covered with a rubber material 14 on the surface. Thereby, it is possible to prevent the metal support member 8 from coming into contact with the side groove lid 2 and to prevent the side groove lid 2 from being damaged.

  Then, the operator lifts the grip portion 4 upward. Thereby, the gutter lid 2 is lifted (see FIG. 1). At this time, since each pair of sandwiching bodies 10 supports the weight of the side groove lid 2, the pair of abutting surfaces 14 a are in strong pressure contact with the side surface 2 a of the side groove lid 2. Therefore, the clamping part 3 can clamp the side groove cover 2 firmly. Furthermore, since the contact surface 14a is formed of the rubber material 14 as described above, the contact member 7 contacts the side groove lid 2 in a high contact state. Further, as shown in FIG. 3, the contact surface 14a is divided into a plurality of regions by the provided slits 14b. And since the divided | segmented several area | region each contact | abuts to the side surface of the side groove cover 2, and elastically deforms, the frictional force which arises between the side surface of the side groove cover 2 and the contact surface 14a improves. As a result, it is possible to accurately prevent the side groove lid 2 from falling off the clamping portion 3.

  Further, as described above, the base material 13 is formed in a thickness dimension that decreases from the upper part toward the lower part, and the rubber material 14 is formed in a substantially uniform thickness dimension. Therefore, the abutting contact member 7 is supported from below by the back surface support portion 8 a in addition to the lower surface support portion 8 b of the support member 8. As a result, the weight of the contact member 7 and the side groove lid 2 acting on the support member 8 when the side groove lid 2 is lifted is distributed to the lower surface support portion 8b and the rear surface support portion 8a. Concentration of weight is prevented. Therefore, the strength of the support member 8 can be improved.

  Further, as described above, the swing member 23 and the sandwiching portion 3 are connected by the two chain portions 24. Therefore, the holding part 3 is prevented from rotating in the horizontal direction and can be used stably.

  Further, as described above, the swing member 23 is attached to the grip portion 4 so as to be swingable about the shaft 39 as a fulcrum. Therefore, even when the grip portion 4 is tilted, the swinging member 23 swings so as to hold the sandwiching portion 3 horizontally, so that the tilt of the grip portion 4 can be offset, and the sandwiching state is maintained. It can always be kept in a stable balance state.

  As described above, the worker can perform this series of operations while standing without standing down. Therefore, it is possible to omit the work of directly displacing the clamping body 10 to the release position, for example, by bending the waist of the worker, and the burden on the worker can be reduced.

  As described above, when the contact member 7 deteriorates, it can be easily replaced with a new contact member 7. Accordingly, when the side groove lid 2 is sandwiched, a strong frictional force can be generated between the contact member 7 and the side groove lid 2, and the side groove lid 2 can be accurately sandwiched. Therefore, the suspended side groove lid 2 can be prevented from falling off from the clamping part 3 due to its own weight, and can be used safely.

  As mentioned above, although the example which concerns on this invention was demonstrated, this invention is not limited to this, A various change is possible in the range which does not deviate from the summary of this invention.

  That is, in the lifting device 1 of the present embodiment, the length of the arm 9 is illustrated such that the holding body 10 does not come into contact with each other in the released state, but is not limited thereto. For example, the arm 9 may have a longer dimension. In this case, by using the pair of arms 9 in a crossed state, the fulcrum (that is, the pivotal support position of the first frame 11 in each sandwiching body 10) and the operating point (that is, the contact with the side surface of the side groove lid 2). The ratio of the distance between the fulcrum and the force point (that is, the connecting position of the chain portion 24) with respect to the distance between the contact positions) is further increased, and the side groove lid 2 can be clamped with a stronger clamping force.

  Moreover, although the arm 9 and the supporting member 8 which comprise the clamping body 10 illustrated what was formed with the separate member in the lifting apparatus 1 of this embodiment, it is not limited to this, It is integrated. It may be formed as an example.

  Further, although the contact member 7 is supported by the lower surface support portion 8b of the support member 8 and the mounting state is fixed by the fixing screw 34, the present invention is not limited to this. For example, the support member 8 does not have the lower surface support portion 8b, and the contact member 7 may be fixed by the fixing screw 34. Also in this case, the contact member 7 can be removed from the support member 8 by removing the fixing screw 34. Alternatively, the contact member 7 may be bonded to the support member 8 using an adhesive or the like.

It is a front view which shows the structure of the lifting apparatus in the state which has a clamping body in a clamping position. It is a front view which shows the structure of the lifting apparatus of the state which has a clamping body in a release position. It is the perspective view which expanded the principal part of the clamping part. It is a disassembled perspective view which shows the structure of the principal part of a clamping part. It is a front view which shows the structure of the state in which the clamping body in the principal part of a clamping part exists in (a) release position and (b) clamping position.

Explanation of symbols

1 Lifting device 2 Side groove cover (heavy object)
2a Side surface 3 Nipping part 4 Grasping part 5 Release means 6 Suspension part 7 Contact member 7a Groove 8 Support member 8a Back support part 8b Lower surface support part 9 Arm 10 Holding body 11 First frame 12 Second frame 13 Base material 13a Projection 14 Rubber material (non-slip means)
14a Contact surface 15 Lever 16 Tube 17 Wire 23 Swing member 24 Chain part 25 Hook (connection member)

The means taken by the present invention to solve the above-mentioned problems are as follows:
“A contact member having anti-slip means on the surface and capable of coming into contact with a heavy object, a support member on which the contact member is detachably mounted, and substantially perpendicular to the contact member from above the support member A pair of sandwiching bodies each having an arm extended to the first, and a pair of the sandwiching bodies that are pivotally connected to each other at a support member side end portion of the arms with the abutting member facing each other. A holding part that includes a frame and holds the heavy object;
A grip portion that is provided above the sandwiching portion and has a substantially rod shape that is disposed such that the longitudinal direction thereof is a horizontal direction;
One end is connected to a position closer to each other than the connection position of the first frame in the pair of arms, and the other end is connected to the grip portion, and the holding portion is suspended from the grip portion. A hanging part connected in a lowered shape,
A second frame that is connected to a position closer to each other than each connection position of the first frame in the pair of arms and restricts the rotational position of the pair of clamping bodies relative to the first frame, and is attached to the grip portion Lever, a tube connecting the lever and the second frame, and being inserted into the tube, connecting the lever and the first frame, and operating the lever to connect the second frame to the first frame And a release means for displacing the pair of holding members from a holding position for holding the heavy load to a release position for releasing the heavy load. Characteristic lifting device "
It is.

In the lifting device having the above-described configuration, the pair of sandwiching bodies are rotatably connected by the first frame at the support member side end portion of the arm, and the positions closer to each other than the connection position are the lower part. It is connected to the gripping part via. Thereby, when a clamping part is suspended, a clamping body rotates in the direction which a pair of contact member adjoins centering on the connection position of a 1st frame. Therefore, according to the lifting device having the above-described configuration, the heavy object can be held and lifted by suspending the holding part while the heavy object is positioned between the pair of contact members. In addition, since the clamping force which a pair of clamping body clamps a heavy article generate | occur | produces with the dead weight of a heavy article, it shows a strong clamping force, so that a heavy article with a heavy weight is clamped.

Claims (3)

An abutting member having anti-slip means on the surface and capable of abutting against a heavy object, a supporting member on which the corresponding abutting member is detachably mounted, and substantially perpendicular to the abutting member from above the supporting member A pair of sandwiching bodies each including an extended arm; and a first frame that rotatably couples the pair of sandwiching bodies with the contact members facing each other, sandwiching the heavy object A clamping part to be
A grip portion that is provided above the sandwiching portion and has a substantially rod shape that is disposed such that the longitudinal direction thereof is a horizontal direction;
One end is connected to a position closer to each other than the connection position of the first frame in the pair of arms, and the other end is connected to the grip portion, and the holding portion is suspended from the grip portion. A hanging part connected in a lowered shape,
A second frame that is connected to a position closer to each other than each connection position of the first frame in the pair of arms and restricts the rotational position of the pair of clamping bodies relative to the first frame, and is attached to the grip portion Lever, a tube connecting the lever and the second frame, and being inserted into the tube, connecting the lever and the first frame, and operating the lever to connect the second frame to the first frame And a releasing means for displacing the pair of holding members from a holding position for holding the heavy load to a release position for releasing the heavy load. Feature lifting device. The contact member is
A base material having a protruding portion that is formed of a hard member and is formed so that the thickness dimension decreases from the upper part toward the lower part and protrudes downward on the lower surface;
The non-slip means is
Formed with a material containing a rubber component and formed with a substantially uniform thickness dimension, comprising a rubber material installed on the surface of the base material,
The support member is
A back support portion for supporting a back surface on the base material side of the contact member;
A lower surface support portion that has a groove portion that can be inserted through the protruding portion and that penetrates in the width direction, and that supports the lower surface of the contact member so as to be slidable in the width direction;
The contact surface of the contact member with the heavy object is
When the clamping body is in the clamping position, it is substantially parallel to the side surface of the heavy object,
2. The lifting device according to claim 1, wherein when the holding body is in the release position, the lifting device is inclined in a direction away from the upper side toward the lower side with respect to the side surface. The hanging part is
A swinging member installed so as to be swingable in the vicinity of an intermediate part in the longitudinal direction of the gripping part;
A connecting member detachably attached to the swing member;
The suspension according to claim 1 or 2, comprising a pair of chain portions connected at one end thereof to the connecting member and connected at the other end to the pair of arms. Upper device.

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