JP5184232B2 - Heavy lifting equipment - Google Patents

Description

  The present invention relates to a heavy load lifting device used when moving a heavy load.

  For example, when cleaning gutters or installing temporary objects, it is necessary to lift and move heavy objects such as gutter lids and temporary building materials, but these heavy objects are made of metal or concrete. Since the weight is large, it is difficult for one person to work, and conventionally two to three people have been working. On the other hand, the apparatus which makes it possible to lift a heavy object such as a side groove cover with a smaller force by applying the lever principle has been devised (see Patent Document 1 and Patent Document 2). According to the techniques disclosed in Patent Document 1 and Patent Document 2, a hook member capable of sandwiching a heavy object from both sides is provided at the tip of the frame with the handle, and the heavy object is sandwiched from both sides by the hook member. When the handle is pushed down, a heavy object can be lifted with a relatively small force by lever action with the wheel provided under the frame as a fulcrum.

JP 2004-76509 A Japanese Utility Model Publication No. 2004-256194

  However, according to the techniques of Patent Document 1 and Patent Document 2, it is necessary to adjust the hook member to a just right position in order to balance and lift a heavy object, whereas the apparatus of Patent Document 1 has two wheels. It was difficult to move left and right, so it was necessary to move it back and forth and turn it back to match the position of the heavy object and the device. On the other hand, the technique disclosed in Patent Document 2 is easy to align because the number of wheels is one, but it is unstable when lifting a heavy object easily in the horizontal direction. Further, in both techniques of Patent Document 1 and Patent Document 2, the fulcrum in the operation of lifting a heavy object is a wheel, which is inconvenient because it can easily move in the front-rear direction during the lifting. In particular, when there is a gradient on the ground, the wheel as a fulcrum moves, so that there is a possibility that the lever action cannot be obtained or the balance of heavy objects is easily lost and the work becomes difficult. Moreover, since it becomes complicated if it is a mechanism which operates a hook member via a wire etc. like patent document 1, there existed a possibility that manufacturing cost might rise or reliability might fall.

  In view of the above, the present invention has a simple structure, is highly compatible with various situations, and can easily lift and move a heavy object by one operator. The issue is to provide

Heavy lifting device of the present invention is provided in the rear end "handle, a frame arm supporting member previously end is attached,
A pair of side surfaces of a heavy object having a substantially rectangular parallelepiped shape that is suspended from and opposed to a pair of arms pivotally connected to the arm support member by a rotation shaft with the substantially horizontal direction as an axial direction. A pair of contact portions that can contact each other, a pair of corresponding contact portions abutting against the heavy load, and a sandwiching portion capable of sandwiching the heavy load,
One wheel mounted on the lower side of the middle part of the frame and grounded and rollable;
A grounding leg that is provided near the wheel and below the frame and closer to the clamping part, and whose lower end protrudes downward from the lower end of the wheel ;
Rotation restriction that is provided on the arm support member, and when the arm support member is tilted to either the left or right side, abuts against the arm on the opposite side to the tilted side and restricts the downward rotation of the tip portion Means ”.

  Here, the “intermediate portion” indicates a portion between one end portion of the frame and the other end portion, and is not particularly limited to the vicinity of the center of the frame. In order to reduce the force applied by the operator to the handle when lifting, it is desirable that the grounding leg is closer to the clamping part than the center. Further, since not only the grounding leg part but also the wheel acts as a fulcrum of the lever, it is particularly desirable that the wheel and the grounding leg part are provided closer to the clamping part than the center.

  According to the present invention, after a pair of abutting portions opposed to each other are brought into contact with the side surface of the heavy object, the lever function has the frame as a lever, the grounding leg as a fulcrum, the handle as a force point, and the clamping portion as an action point. It is possible to lift heavy objects. That is, when a pair of opposed contact portions are brought into contact with each other so as to sandwich a heavy object and the handle side of the frame is lowered, the tip side of the frame to which the arm support member is attached is lifted with the grounding leg portion as a fulcrum. . In the pair of arms pivotably connected to the arm support member, as the arm support member rises, the rotation shaft portion rises and rotates, and the tip portion provided with the contact portion hangs down. At this time, since the distance between the pair of contact portions is narrowed, the heavy object is held. When the handle is further lowered, the sandwiching portion rises with the abutment portion sandwiching the heavy load, and the heavy load is lifted. When a heavy object is lifted and a downward force is applied due to gravity, the pair of arms rotate to the side that narrows the distance between the contact parts, and the force to hold the heavy object in the contact part increases. Is firmly clamped by and rises with the clamping part.

  Thus, when a heavy object is lifted using the lever action, the grounding leg portion is stable as a fulcrum of the lever because it does not move easily due to the frictional force with the ground. Then, after lifting the heavy object, the user further lowers the handle so that the wheel is grounded, the grounding leg is lifted, and the heavy object lifting device is supported by the wheel while the heavy object is being lifted. be able to.

  It is also possible to move with a wheel when positioning the heavy lifting device of the present invention with respect to a heavy object. It's easy to do. Further, when the lifted heavy object is lowered, the positioning is similarly easy, and the lifting of the heavy object and the efficiency of the carrying work can be improved. Further, once the positioning is performed, the grounding leg is grounded while the heavy object is being lifted and lowered, so that the position is less likely to be displaced than when the heavy object is lifted and lowered with the wheel as a fulcrum. Especially when there is a gradient on the ground of the work place, if the wheel is a fulcrum, it is easy to move to the lower side according to the gradient, it is difficult to align, and the wheel that is the fulcrum for obtaining the lever action moves well. While there is a possibility that it cannot be lifted, the heavy load lifting device of the present invention includes wheels and a grounding leg, so that the lifting work can be stably performed even in a sloped place. It is also easy to move heavy objects.

  By these actions, it is possible to easily lift a heavy object using the lever action with the grounding leg as a fulcrum by the power of one user, and further move the heavy object using a wheel.

  According to this configuration, the rotation of the arm is limited by the rotation limiting means, the arm tip is prevented from lowering and the contact portions approach each other, and the pair of contact portions are separated from the predetermined interval. Can be kept in a separated position. As a result, the pair of arms are kept open so as to have a predetermined positional relationship with each other, so that the holding portion can be easily abutted against the heavy object by operating the handle to easily spread the holding portion. The contact portion can be moved to a position where a heavy object is sandwiched.

  By the way, it is not possible to lower the heavy load unless the holding portion is widened to release the holding, but if the lifting portion is lifted as it is from the state where the heavy load is lowered, the heavy load will be held again, so the holding is released. It becomes difficult. On the other hand, according to this configuration, it is possible to easily release the clamping by operating the handle. A method of releasing this clamping will be described below. When the heavy object is lowered to a predetermined position and brought into contact with the ground, the pair of arms spread and the opposing contact portions are separated from the heavy object. When the handle is tilted in the left-right direction in this state, the frame and the arm support member are tilted in the same direction as the handle, and the rotation limiting means provided on the arm support member is also tilted together with the arm support member. The angle formed between the arm and the arm support member opposite to the direction in which the arm support member is inclined is the same as when the arm is rotated downward. When the arm support member is inclined beyond the predetermined angle, the arm is rotated. The restricting means comes into contact with the arm, and the downward rotation of the arm is restricted. That is, when the inclination of the arm support member further proceeds, the arm that is in contact with the rotation restricting means is lifted and the tip side is raised. On the other hand, the arm in the direction in which the arm support member is inclined is the same as the case where the arm is rotated upward with respect to the arm support member, so that the rotation is not limited. For this reason, the abutting portion of the arm that is lifted by abutting against the rotation restricting means is separated from the heavy object and can be raised to a position higher than the upper surface of the heavy object, and the frame is turned left and right by the handle operation. If the abutting portion is brought into contact with the upper surface instead of the side surface of the heavy load by shifting the holding portion to the left and right, it is possible to make it possible to raise only the holding portion without holding the heavy load again.

Further, the heavy article lifting device of the present invention includes a frame having a handle provided at the rear end, and an arm support member suspended at the front end so as to be rotatable about a substantially horizontal direction as an axial direction;
A pair of arms pivotally connected to the arm support member with a substantially longitudinal direction as an axial direction;
A pair of abutment portions that each have a shape that hangs down from the tip of the pair of arms and can abut against a pair of side surfaces of a heavy object that has a substantially rectangular parallelepiped shape;
And provided on the arm support member, and when the arm support member is tilted to either the left or right side, the arm is in contact with the arm on the opposite side to the tilted side to limit the downward rotation of the tip portion. A clamping unit that includes a rotation limiting unit that tilts together with the arm support member, and is capable of clamping the heavy object by bringing the pair of abutting parts into contact with the heavy object;
One wheel mounted on the lower side of the middle part of the frame and grounded and rollable;
Near the wheel and provided below the frame closer to the clamping part than the wheel,
A grounding leg for supporting the frame by grounding when the clamping part is at a position lower than a predetermined position; and for supporting the frame when the clamping part is at a position higher than the predetermined position. It can also be configured as

  According to this configuration, the same effects as the configurations of the first and second aspects can be achieved.

  Further, according to this configuration, even when the frame is tilted in any of the front and rear directions, it is possible to continue to suspend the holding portion in a certain direction. The same applies to the case where a heavy object is held, and the heavy object can be stably lifted and moved in a predetermined direction. This is particularly suitable for a case where a substantially rectangular parallelepiped heavy object such as a side groove cover is moved in a horizontal state. Since the holding portion can be stabilized substantially horizontally, it is possible to raise and lower a heavy object while suppressing the possibility that the positioning becomes difficult due to unevenness and gradient of the ground.

  As described above, according to the present invention, a heavy load suspension that has a simple structure and can be used in a place with a gradient and can be easily lifted and moved by one operator by lever action. An upper device can be provided.

  Hereinafter, a gutter lid lifting apparatus 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a perspective view showing a side groove lid lifting device 1 according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a configuration of a clamping portion and a fulcrum portion of the side groove lid lifting device 1. 3 is an explanatory view showing the operation of the side groove lid lifting device 1, FIGS. 4 and 5 are explanatory views showing the operation of the clamping portion when releasing the side groove lid, and FIG. 6 is a side groove lid. It is explanatory drawing shown about position alignment of the lifting apparatus.

  As shown in FIG. 1, the side groove lid lifting device 1 has a handle portion 17 attached to one end portion of a frame 2 that is a bent metal pipe-like member, and a frame on the opposite side to the handle portion 17. The clamping part 3 is attached to the end part of 2. Further, a leg portion 4 having a grounding leg member 5 and a wheel 7 is attached to the lower side of the frame 2.

  The frame 2 is a bent portion 13 with an intermediate portion bent. The oblique portion 12 extends obliquely upward on the side closer to the handle portion 17 than the bent portion 13, and the horizontal portion extends substantially in the horizontal direction on the side close to the sandwiching portion 3. 11 The oblique upper part 12 is longer than the horizontal part 11 and lifts with a smaller force when lifting the side groove cover C held by the holding part 3 by lever action as will be described later.

  A pipe-like handle portion 17 extending in a direction orthogonal to the oblique upper portion 12 is welded to the tip of the oblique upper portion 12, and has a T shape. The handle portion 17 is covered with rubber gripping portions 18 having a surface shape for preventing slipping, and the handle portion 17 is gripped when the user operates the side groove lid lifting device 1. It has become easier. Here, the combination of the handle portion 17 and the grip portion 18 corresponds to the handle of the present invention.

  As shown in FIG. 2 (a), a suspension base 14 that is bifurcated into a U-shape is attached to the tip of the horizontal portion 11, and penetrates the suspension base 14 in the left-right direction, and is mounted on a horizontal bolt. 15 is erected. The clamping part 3 is pivotally supported by a horizontal bolt 15 in an arm support member 16 and is suspended so as to be rotatable. As shown in FIGS. 3A and 3B, the arm support member 16 has an inverted J-shaped vertical cross-sectional shape, and the horizontal bolts 15 are provided on the inner peripheral side of the upper round curved portion. Has a bearing portion 16a to which a cylindrical member is inserted, and a plate-like portion 16b extending downward. A right arm 25 and a left arm 26 extending substantially parallel to the left and right are pivotally connected to the arm support portion 16 coaxially by pivot bolts 23 whose axial direction is the front-rear direction. Each of the right arm 25 and the left arm 26 is an elongated member having an L-shaped cross section, and a right claw portion 21 is provided on the right arm 25 and a left claw portion 22 is provided on the left arm 26 on the left and right tip sides, respectively. It has been. Each of the right claw portion 21 and the left claw portion 22 has a plate shape protruding downward, and has a right abutment surface 21a and a left abutment surface 22a that face each other toward the center side. Yes. Here, the right arm 25 and the left arm 26 correspond to the arm of the present invention, the right claw portion 21 and the left claw portion 22 correspond to the contact portion of the present invention, and the pivot bolt 23 corresponds to the present invention. Corresponds to the pivot axis.

  A right arm rotation restricting member 31 having a substantially parallelogram-like plate shape is attached to the front surface of the arm support portion 16, and the right arm 25 is rotated when the right claw portion 21 is rotated downward. The upper end surface of 25 abuts against one side of the right arm rotation restricting member 31, and the rotation of the right arm 25 is restricted. Further, even when the right arm 25 is rotated in the direction in which the right claw portion 21 is raised, the upper end surface of the right arm 25 comes into contact with the other side of the right arm rotation restricting member 31 when the right arm 25 is rotated to a predetermined angle. The rotation of the right arm 25 is restricted. Thus, the rotatable range of the right arm 25 is limited by the right arm rotation limiting member 31.

  As shown in FIG. 2B, a left arm rotation limiting member 32 having substantially the same shape as the right arm rotation limiting member 31 is attached to the back surface of the arm support member 16. The relationship between the left arm 26 and the left arm rotation limiting member 32 is the same as the relationship between the right arm 25 and the right arm rotation limiting member 31, and the rotation of the left arm 26 is limited to a predetermined range. . Since the right arm rotation restricting member 31 and the left arm rotation restricting member 32 have substantially the same shape, the rotatable range of the right arm 25 and the left arm 26 is substantially sandwiched across the center line of the arm support member 16. It becomes line symmetric. Here, the right arm rotation restricting member 31 and the left arm rotation restricting member 32 correspond to the rotation restricting means of the present invention.

  The arm support member 16 is pivotally supported by a horizontal bolt 15 inserted through a bearing portion 16a so as to be rotatable, and a plate-like portion 16b hangs down according to gravity. Since the plate-like portion 16a is rotatable, the plate-like portion 16b is kept hanging downward even when the frame 2 is inclined in the front-rear direction. Thereby, when aligning in order to clamp the side groove cover C, exact alignment can be performed easily. Further, when the side groove cover C is sandwiched by the sandwiching portion 3, the side groove cover C can be kept substantially horizontal even during elevation and movement.

  The leg 4 is configured by attaching a grounding leg member 5 and a wheel support member 6 that supports the wheel 7 to a flat leg base 8 welded to the lower side of the frame 2. The grounding leg member 5 attached below the leg base 8 is a metal member having a downwardly convex V-shape made by bending a plate material, and the lower end has a rounded shape. . The grounding leg member 5 is attached so that the plate surface faces the front-rear direction. A wheel 7 pivotally supported by the wheel support member 6 is mounted at a position closer to the bent portion 13 than the grounding leg member 5. The wheel 7 is mounted in the longitudinal direction of the horizontal portion 17 of the frame 2 and can be rotated in the front-rear direction. The lower end of the grounding leg member 5 protrudes downward from the lower end of the wheel 7. When the longitudinal direction of the horizontal portion 11 is substantially horizontal, the grounding leg member 5 is in contact with the ground and the wheel 7 is grounded. It is gone. In this example, the wheel support member 6 and the wheel 7 are commercially available casters, and are fastened to the leg base 8 with bolts. Further, the wheel 7 is provided with a rubber tire that is excellent in load-bearing performance and is not slippery.

Hereinafter, the lifting operation of the side groove lid will be described with reference to FIG.
As shown in FIG. 3A, when the side groove cover C is lifted, first, the ground leg 5 is grounded at a position where the right claw portion 21 and the left claw portion 22 coincide with the end portion of the side groove cover C. Contact B. When the clamping part 3 is lowered until the right claw part 21 and the left claw part 22 are positioned on the side of the side groove cover C, the grounding leg part 5 is grounded and the frame 2 is supported by the grounding leg part 5. Become. At this time, the wheel 7 also floats from the ground B. When the user pushes down the handle portion 17 from this state, the holding portion 17 is acted upon by lever action with the handle portion 17 as a power point, the lower end portion of the grounding leg portion 5 in contact with the ground B as a fulcrum, and the holding portion 3 as an action point. 3 rises.

  As the clamping part 3 is raised, the right arm 25 and the left arm 26 are lifted by the pivoting bolt 23, so that the base side rises, while the pivoting bolt 23 is pivoted and the tip side is suspended. To do. At this time, the gap between the right claw portion 21 and the left claw portion 22 is narrowed, and the side groove cover C is sandwiched between the right contact surface 21a and the left contact surface 22a that are in contact with each other on the side surface of the side groove cover C. When the holding portion 3 is further raised from the state in which the side groove cover C is held between the right contact surface 21a and the left contact surface 22a, the right arm 25 and the left arm 26 are further rotated by the weight of the side groove cover C, and the right Since the distance between the claw portion 21 and the left claw portion 22 moves to the side that becomes narrower, the side groove cover C is tightened by the right contact surface 21a and the left contact surface 22a, and the side groove cover C is lifted without dropping.

  Since the wheel 7 is mounted at a position closer to the handle part 17 than the grounding leg part 5, the wheel 7 descends as the side groove cover C rises, and the wheel 7 contacts the ground when the side groove cover C rises to a predetermined height. . When the handle portion 17 is further lowered and the side groove cover C is lifted, the fulcrum of the lever action moves from the grounding leg portion 5 to the wheel 7 as shown in FIG. 5B, and the wheel 7 moves the side groove cover lifting device 1. To support. When the grounding leg 5 is lifted and supported by the wheel 7, the side groove cover lifting device 1 can be moved back and forth while the side groove cover C is lifted.

  Further, as shown in FIG. 5 (b), the horizontal portion 11 gradually tilts forward as the clamping portion 3 rises, but the arm support member 16 has an upper portion 16a formed in a round hook shape. Since it is suspended from the horizontal bolt 15, the side groove cover C is lifted while maintaining a balance and being substantially horizontal.

  Hereinafter, based on FIG. 4 and FIG. 5, the operation | movement which cancels | releases clamping from the state which the clamping part 3 clamped the side groove cover C is demonstrated. As shown in FIG. 4A, when the side groove cover C is clamped by the clamping part 3, the contact surface 21a and the contact surface 22a are firmly in contact with the side groove cover C, and the clamping part 3 is raised. And the side groove cover C is in a state of being lifted. At this time, both the right arm 25 and the left arm 26 are in a state where the tip side is slightly lowered.

  As shown in FIG. 4B, when the handle portion 17 (see FIG. 1) is operated to tilt the frame 2 toward the left arm 26, the left arm 26 rotates about the pivot bolt 23, The right arm 25 remains in contact with the side groove lid C, but the right arm 25 is in contact with one side of the right arm rotation restricting member 31 and the tip end side is restricted from rotating downward. With the frame 25 in contact with the right arm rotation restricting member 31, the distal end side of the right arm 25 rises with the inclination of the frame 2, the right claw portion 21 moves away from the side groove cover C, and the clamping state is released. If the clamping part 3 is shifted in the substantially horizontal direction to the left arm 26 as it is, the right claw part 21 is shifted above the side groove cover C while the right arm 25 is in a state where the tip side is lifted. When the handle portion 17 is operated from this state to raise the frame 2, the right claw portion 21 is placed on the side groove cover C and thus does not return to the clamping state.

  Further, as shown in FIG. 5D, when the frame 2 is inclined to the right arm 25 side, the right claw portion 21 of the right arm 25 is in contact with the upper surface of the side groove cover C, It rotates about the tie bolt 23 as an axis, but the left arm 26 abuts on one side of the left arm rotation restricting member 32 (see FIG. 2 (b)), and the tip is the same as the right arm 25 in FIG. 4 (b). As the frame 2 is inclined, the distal end side of the left arm 26 is raised and the left claw portion 22 is lifted. As shown in FIG. 5 (e), when the holding part 3 is further moved toward the left arm 26 as it is, the left claw part 22 is also separated from the side groove cover C when the frame 2 is raised, and the side groove cover C is predetermined. The side groove cover lifting device 1 can be detached from the side groove cover C.

  Next, an operation when the holding unit 3 is aligned will be described. When the side groove cover C is lifted as described above or when the side groove cover C is installed, it is necessary to align the positions. As shown in FIG. 1 to FIG. 3, the side groove lid lifting device 1 includes a single wheel 7 below the leg base 8, and can move back and forth when the wheel 7 is installed. Is possible. Moreover, as shown in FIG. 6, it is easy to turn around the leg base 8 (wheel 7) and change the direction. For example, from the position indicated by the solid line, the wheel 7 is rolled forward and moved to the position indicated as A1, or the wheel 7 is turned to the right around the wheel 7 and moved to the position indicated as A2. It can be swung and moved to the position indicated as A3. Thus, since the gutter lid lifting apparatus 1 can be supported by one wheel 7, the position can be easily adjusted according to the operation of the user.

  As described above, according to the side groove lid lifting device 1 of the embodiment of the present invention, the opposed right claw portion 21 and left claw portion 22 are brought into contact with the side surface so as to sandwich the side groove lid C to be lifted, A heavy object can be lifted by a lever action with the frame 2 as a lever, the grounding leg 5 as a fulcrum, the handle portion 17 as a power point, and the clamping portion 3 as an action point.

  Further, when lifting a heavy object using the lever action in this way, the grounding leg 5 does not move easily due to the frictional force with the ground, and is stable as a fulcrum of the lever. Then, after lifting the side groove cover C, the user further lowers the handle portion 17 so that the wheel 7 is grounded and the grounding leg portion 5 is lifted, and the side groove cover lifting device 1 is moved to the wheel while the side groove cover C is lifted. 7 can be made movable.

  The side groove cover C can be moved by the wheel 7 also when the side groove cover lifting device 1 of the present invention is aligned with the side groove cover C, but the wheel 7 is only one wheel and can be turned easily. Easy to align. Similarly, when the lifted side groove cover C is lowered, the alignment is easy, and the side groove cover C can be lifted and transported more efficiently. Further, once the positioning is performed, the grounding leg portion 5 is grounded while the side groove cover C is being raised and lowered. Therefore, the position is less likely to be displaced than when the side groove cover C is lifted and lowered with the wheel 7 as a fulcrum. In particular, when there is a gradient on the ground of the work place, if the wheel 7 is a fulcrum, it is easy to roll to the lower side according to the gradient, and positioning is difficult, and the wheel 7 that is a fulcrum for obtaining the lever action moves. However, since the side groove lid lifting device 1 includes the wheel 7 and the grounding leg 5, the lifting work can be stably performed even in a sloped place. It is also easy to move the suspended side groove lid C.

  Further, according to the side groove cover lifting device 1 of the above embodiment, the side groove cover C can be sandwiched and released by operating the handle portion 17, so that an operation lever, a wire, or the like for operation of the sandwiching portion 3 is provided. There is no need to prepare. Thereby, it can be set as a simple structure with few number of parts.

  Further, according to the side groove lid lifting device 1 of the above embodiment, the rotation of the corresponding arm is restricted by the right arm rotation restriction member 31 and the left arm rotation restriction member 32, respectively, and the tip end side of the arm is lowered. Thus, the right claw portion 21 and the left claw portion 22 can be prevented from approaching each other, and the right claw portion 21 and the left claw portion 22 can be kept at positions separated from a predetermined interval. Accordingly, when the right claw portion 21 and the left claw portion 22 are brought into contact with the side groove cover C by the handle operation, the right arm 25 and the left arm 26 are easily spread, and the right claw portion 21 and the left claw portion 22 are made heavy. Can be easily moved to a position sandwiching

  Further, according to the side groove cover lifting device 1 of the above embodiment, the holding can be easily released by operating the handle, and therefore, one operator can perform all operations until the side groove cover C is held, moved, and released. Only work can be done.

  Furthermore, according to the side groove lid lifting device 1 of the above embodiment, even when the frame 2 is tilted in either the front or rear direction, it is possible to keep the holding portion 3 in the predetermined direction and continue to suspend it. The same applies to the case where the side groove cover C is held, and the side groove cover C can be lifted and moved stably in a predetermined direction. This is particularly suitable when the lateral groove lid C, which is a substantially rectangular parallelepiped, moves while maintaining a horizontal state. According to this example, since the clamping part 3 can be stabilized substantially horizontally, the side groove cover C can be raised / lowered while suppressing the possibility that the positioning becomes difficult due to the unevenness and the slope of the ground.

  With these actions, according to the side groove cover lifting device 1 of the above embodiment, the side groove cover C can be easily lifted using the lever action with the grounding leg 5 as a fulcrum by the power of one user, and the wheel 7 can be used to move the gutter lid C.

  The present invention has been described with reference to preferred embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention as described below. And design changes are possible.

  That is, in the above embodiment, the lengths of the right arm 25 and the left arm 26 are constant, but the length is not limited to this, and the lengths of the right arm 25 and the left arm 26 are changed. May be. That is, the lengths of the right arm 25 and the left arm 26 may be longer or shorter than those of the above-described embodiment, or the length may be adjustable. For example, a plurality of holes through which the pivot bolt 23 is passed through the right arm 25 and the left arm 26 are provided at predetermined intervals, and the length of the right arm 25 and the left arm 26 can be changed by changing the hole through which the pivot bolt 23 is passed. It is good also as what can change the width | variety and can change the width | variety of the clamping part 3. FIG. Thereby, it can adjust so that it may be easy to use by changing the width | variety of the clamping part 3 according to the articles | goods to lift.

  In the above-described embodiment, the frame 2 has a constant length. However, the frame 2 may have a structure that can be expanded and contracted to adjust the length. By adjusting the length of the frame 2, it is possible to make the length easy to work according to the physique and physical strength of the user. In addition, it can be shrunk for easy storage. In addition, convenience can be improved by adjusting the length of the frame 2 when used in a narrow place.

  In the above embodiment, the frame 2 and the handle portion 17 are welded and are not easily disassembled. However, the present invention is not limited to this, and each portion can be easily disassembled and stored. The structure may be a foldable structure. Thereby, the accommodation at the time of accommodation or the conveyance to a work place can be improved.

  Further, in the above-described embodiment, the frame 2 is configured by a single bent pipe-shaped member. However, the present invention is not limited to this, and for example, a ladder-shaped frame may be used. Alternatively, it may be constituted by a pipe that is not bent, and can be variously changed according to the material, application, and the like.

  Moreover, in said embodiment, although the side groove cover lifting apparatus 1 for raising the side groove cover C was shown as an example, it is not limited to this, It is an apparatus for lifting heavy objects other than a side groove cover. There may be. For example, a device for transporting a temporary floorboard or the like, or a device for other purposes may be used.

It is a perspective view which shows the side groove lid lifting apparatus which is one Embodiment of this invention. It is a perspective view which shows the structure of a clamping part and a leg part. It is explanatory drawing which shows the effect | action of a side groove lid lifting apparatus. It is explanatory drawing which shows the effect | action of a clamping part when releasing clamping of a side groove cover. It is explanatory drawing which shows the effect | action of a clamping part when releasing clamping of a side groove cover. It is explanatory drawing shown about position alignment of a side groove lid lifting apparatus.

Explanation of symbols

B Ground C Side groove cover 1 Side groove cover lifting device (heavy load lifting device)
2 Frame 3 Clamping part 5 Grounding leg member 7 Wheel 16 Arm support member 17 Handle part (handle)
18 Gripping part (handle)
21 Right claw part (contact part)
22 Left claw part (contact part)
23 Pivoting bolt (rotating shaft)
25 Right arm (arm)
26 Left arm (arm)
31 Right arm rotation limiting member (rotation limiting means)
32 Left arm rotation limiting member (rotation limiting means)

Claims (1)

Handle is provided on the rear end, and a frame arm supporting member previously end is attached,
A pair of side surfaces of a heavy object having a substantially rectangular parallelepiped shape that is suspended from and opposed to a pair of arms pivotally connected to the arm support member by a rotation shaft with the substantially horizontal direction as an axial direction. A pair of contact portions that can contact each other, a pair of corresponding contact portions abutting against the heavy load, and a sandwiching portion capable of sandwiching the heavy load,
One wheel mounted on the lower side of the middle part of the frame and grounded and rollable;
A grounding leg that is provided near the wheel and below the frame and closer to the clamping part, and whose lower end protrudes downward from the lower end of the wheel ;
Rotation restriction that is provided on the arm support member, and when the arm support member is tilted to either the left or right side, abuts against the arm on the opposite side to the tilted side and restricts the downward rotation of the tip portion heavy lifting apparatus characterized by comprising a <br/> and means.

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