JP6388040B2 - Building plate lifting tool - Google Patents

Description

  The present invention relates to a lifting tool for a building plate mainly used in a construction work site.

  Conventionally, hollow cement board materials, such as an extrusion-molded cement board, are used as construction board materials, such as an outer wall and a floor. After this building board is produced at the factory, it is transported to the construction site by truck etc. and temporarily placed in a state where a plurality of sheets are stacked, and then transported to a predetermined place of the building by a crane and assembled. ing. However, since the building plate materials are stacked without any gaps between the upper and lower sides in the temporarily placed state, it is impossible to pass the lifting aids such as the locking metal fittings and slings to be lifted by the crane under the building plate materials. In some cases, it is necessary to prepare for a later lifting work by inserting a ring first between the stacked upper and lower building boards and opening a gap. As a preparatory work for unloading, it is necessary to lift one end of the building board one by one, and provide a clearance between the lower end of the building board and pass the lifting aid and wheel. Conventionally, since this preliminary work has been performed manually, a minimum of two persons, that is, a worker who lifts and a worker who passes a lifting aid or a wheel are required.

  In order to simplify such manual work, for example, in Patent Document 1 below, the base end portion is gripped by the operator's hand, and the front end portion touches the upper surface of a building board material such as a lightweight cellular concrete panel. A rod-shaped operation part that is in contact with the branch-shaped projecting part protruding from the middle of the rod-shaped operation part, and a rod-shaped operation part that is fixed to the tip of the branch part so as to extend in the orthogonal direction. A lifting tool for a building board material such as a lightweight cellular concrete panel provided with a joint fitting portion fitted to the portion is disclosed. In this lifting tool, by applying the lever principle with the joint fitting portion as an action point, one end side of the building board can be easily lifted with a small force.

Japanese Utility Model Publication No. 05-087553

  However, for example, a board material for construction such as an extrusion-molded cement board material is heavy due to its material, and therefore, in large-scale construction, a large number of building board materials are installed. There was also a risk that hands could get caught between building boards.

  Further, in the lifting tool disclosed in the above-mentioned Patent Document 1, although the force to lift the building board material borne by the operator by the lever principle is somewhat reduced, the lifting state of one of the building board materials is held by human power. However, since it is necessary to pass the lifting aids such as locking brackets and slings to lift with a crane in the gap opened between the lower building board material, There is a problem that it is impossible to work alone and it is inefficient.

  The present invention has been made in view of the problems as described above, and the main purpose is that it is possible to install a lifting aid such as a locking bracket or a lifting string for lifting a building plate alone, And it is providing the lifting tool of the board material for construction which can reduce the effort and labor, and can perform attachment of a lifting auxiliary tool and insertion work of a wheel safely even if it is working alone. .

  In order to achieve the above object, the lifting tool for a building board material according to the present invention is configured such that a vertical movement member supported by a tool main body portion so as to be movable in the vertical direction moves up and down by operation of the movable handle portion. The vertical moving member is a lifting tool for a building board that lifts the end of the building board, and the tool body has a sliding support shaft provided with a support handle at a substantially central part of the base, The vertical moving part includes a vertical sliding cylinder that moves up and down while being guided by being externally fitted to the sliding support shaft, and a lifting base that moves up and down together with the vertical sliding cylinder and lifts an end of the building member And the movable handle portion is configured such that an intersection of a vertical hook and a horizontal hook of an L-shaped rotary hook provided with the movable handle is rotatably connected to the connecting arm, and an end of the horizontal hook. The part is pivotably connected to the pedestal via a connecting rod. It is characterized in that it is.

  The linear distance between the axis of the intersection of the L-shaped rotary rod and the axis provided on the side plate of the base is the axis of the intersection of the L-shaped rotary rod and the shaft provided at the tip of the horizontal rod. It is characterized in that it is shorter than the sum of the length of the distance and the distance between the shaft provided at the tip of the horizontal rod and the shaft provided on the side plate of the pedestal.

  Further, the connecting arm is characterized in that the two connecting arms are provided so as to protrude in parallel from the vertical sliding portion with an interval of the width of the intersecting portion of the movable handle portion.

Furthermore, the sliding support shaft and the vertical sliding cylinder fitted around the sliding support shaft have a quadrangular cross-sectional shape.

The movable handle is bent to the pulling side.

  According to the above means, the lifting tool support and the pedestal are inserted into the concave portions adjacent to the top and bottom of the laminated building board material, the support handle is gripped by one hand, and the movable handle is gripped by the other hand. The work can be done simply by pulling it in its own direction, and the work is easy. By increasing the ratio between the length of the movable handle and the lifting base, the operator's pulling force on the movable handle can be weakened, so there is less fatigue. . Furthermore, after the movable handle is pulled to the end and the building board is lifted to form the gap, the gap can be maintained even if the hand is released, so one person can insert the lifting aid into the formed gap. This can be done to save labor. Because it is small, it is convenient to carry.

  The linear distance between the axis of the intersection of the L-shaped rotary rod and the axis provided on the side plate of the base is the axis of the intersection of the L-shaped rotary rod and the shaft provided at the tip of the horizontal rod. When the movable handle is pulled to the front by making it shorter than the sum of the distance and the length of the distance between the shaft provided at the tip of the horizontal rod and the shaft provided on the side plate of the pedestal The state where the horizontal plate and the connecting rod are bent and abutted against the sliding support shaft while the tips of the connecting rods are bent is maintained at an interval between the building plate materials.

  If the connecting arm is composed of two connecting arms and the intersection of the L-shaped rotating part enters between them, the rotating intersection is sandwiched between the connecting arms and protected. Further, if the cross-sectional shape of the sliding support shaft or the vertical sliding cylinder is a quadrangle, since they do not rotate with each other, only the vertical movement is achieved and the operation is stabilized. Furthermore, since the movable handle is bent toward the pulling side, the distance between the movable handle and the support handle is increased, so that the user can easily put in the hand and work efficiency is improved.

Overall perspective view of one embodiment of the present invention Perspective view of tool body Front view of the tool body in FIG. Perspective view of vertical moving part FIG. 4 is a front view of the vertical movement unit. Perspective view of movable handle Front view of the movable handle portion of FIG. Perspective view of connecting rod Lifting tool explanatory diagram at the time of installation to the end of the building plate Lifting tool explanatory drawing while lifting the edge of building plate Lifting tool explanatory diagram when the end of the building plate is lifted to the end Cross section of FIG. Illustration for use when mounting on the edge of a building plate Illustration of lifting and using the edge of a building plate Reference drawing of lifting construction board with crane

  Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 7, a lifting tool 1 for a building board material according to the present invention includes a tool main body 2, a vertical moving portion 3 that is guided by the tool main body 2 and moves up and down, and the vertical movement. The movable handle part 4 which lifts the part 3 upward by the lever principle is a main constituent. The building board A lifted by the building board lifting tool 1 is intended to have a recess B such as a hole or a groove formed in at least one of the four side end surfaces.

  As shown in FIGS. 2 and 3, the tool main body 2 includes a pedestal 5, a sliding support shaft 6 including a rectangular column fixed to a substantially central portion inside the pedestal 5, and the sliding support shaft. 6 has a support handle 7 having a hand grip fixed to the upper end of 6 at the tip. Furthermore, a shaft hole 5 c is formed on one end side of the both side plates 5 b of the pedestal 5. The length of the sliding support shaft 6 and the length of the support handle 7 are appropriately selected according to the lifting distance of the building board A. If the inside of the sliding support shaft 6 is hollow, the overall weight is reduced. The sliding support shaft 6 and the support handle 7 may be integrally formed of the same member.

  As shown in FIGS. 4 and 5, the vertical moving unit 3 includes a vertical sliding cylinder 9 that is fitted on the sliding support shaft 6 of the tool body 2 and moves up and down, and the vertical sliding cylinder 9. A lifting base 10 to be inserted into the recess B of the building board A protrudes on the side surface located in the center part in the height direction and above the side plate 5b forming the base 5 on the side opposite to the side where the shaft hole 5c is formed. Is provided. Further, on the side opposite to the lifting platform 10, two connecting arms 11 having shaft holes 11a formed at the tips are provided so as to protrude in parallel with a gap in the width of the movable handle portion 4.

  As shown in FIGS. 6 and 7, the movable handle portion 4 has a handle at the tip above the vertical rod 12 a of the L-shaped rotary rod 12 having an L shape in side view, and the support handle 7. The movable handle 13 that is slightly bent in the direction of the worker is fixed in order to increase the work efficiency by increasing the distance between the vertical hook 12a and the tip of the horizontal hook 12b that extends in a direction substantially perpendicular to the vertical hook 12a. In addition, shaft holes 12d and 12e are provided at intersections 12c of the vertical rod 12a and the horizontal rod 12b, respectively. As can be seen from FIGS. 1, 6, etc., the tip of the movable handle 13 is substantially the same height as the tip of the support handle 7 so that the work efficiency is improved. Further, the L-shaped rotary rod 12 may be formed by bending a rectangular column rod packed inside at a right angle, or may be a hollow member having a U-shaped cross section made of a metal plate. In the case of a U-shaped hollow member, in addition to reducing the overall weight, it is easy to form the shaft hole 12d formed in the horizontal rod 12b.

  Further, in the state of FIG. 11 in which the movable handle 13 is pulled down to the nearest side, the linear distance a between the shaft 14 of the intersection 12c of the L-shaped rotary rod 12 and the shaft 17 provided on the side plate 5b of the base 5 is The distance b between the shaft 14 of the intersection 12c of the L-shaped rotary rod 12 and the shaft 16 provided at the tip of the horizontal rod 12b, the shaft 16 provided at the tip of the horizontal rod 12b, and the side plate 5b of the pedestal 5 It is formed so as to be shorter than the sum of the distances c from the shaft 17 provided in the. That is, a <b + c. Thus, even when the load of the building plate A is applied to the lifting base 10 and the vertical sliding cylinder 9 is biased downward, the ends of the horizontal rod 12b bent around the shaft 16 and the end of the connecting rod 15 are slidably supported. The lowering can be prevented by coming into contact with the side surface of the shaft 6, and the distance D <b> 3 can be stably maintained even if both hands speak from the support handle 7 and the movable handle 13.

  When using the building tool lifting tool 1 having the above main constituent elements, it is used in an assembled state as shown in FIG. First, the tool body 2 and the vertical moving part 3 are connected by fitting a vertical sliding cylinder 9 on the sliding support shaft 6. Next, the intersecting portion 12c of the movable handle portion 4 is inserted between the two connecting arms 11 of the vertical moving portion 3, and the shaft holes 11a of the two connecting arms 11 and the shaft holes 12e of the intersecting portion 12c are aligned. The shaft 14 is inserted and fixed so that the movable handle portion 4 is rotatable with respect to the vertical moving portion 3. The intersection 12c is safe to move to enter the inside of the two connecting arms 11.

  Then, the shaft hole 12d formed at the tip of the horizontal rod 12b of the L-shaped rotary rod 12 of the movable handle portion 4 and the one end of the connecting rod 15 formed in advance to a predetermined length are formed. The shaft 16 is inserted into the shaft hole 15a so as to be rotatable with respect to each other, and another shaft hole 15b formed at the other end of the connecting rod 15 and the side plate 5b of the base 5 of the tool body 2 A shaft 17 is inserted so as to coincide with the shaft hole 5c provided on the shaft 5 so as to be rotatable with respect to each other. When the horizontal rod 12b is hollow with a U-shaped cross section and has two side plates 12f, the connecting rods 15a are aligned with the inner sides of the two side plates 12f, so that the connecting rod 12a Since the rotating part is protected by the side plate 12f, it is safe. Similarly, the lower ends of the two connecting rods 15 are similarly safely protected if they are aligned with the inner sides of the two side plates 5b forming the pedestal 5. Although two connecting pipes 15 are used, instead of the horizontal rod 12b, a hollow tube having a U-shaped cross section and having two side plates is used as the connecting rod 15. This is the same as that the ridges 15 are connected to each other, and there is an advantage that the rigidity and durability are generated and the operation is stable and smooth.

  The use of the building tool lifting tool 1 of the present invention assembled as described above will be described with reference to FIGS. At the start of use, as shown in FIG. 9, the movable handle 13 is set up in a substantially vertical direction in the same manner as the support handle 7. As a result, the vertical sliding cylinder 9 of the vertical moving portion 3 has the connecting rod 15 rotatably connected to the pedestal 5 and the horizontal rod 12b by the shaft 16, and moves vertically to the intersecting portion 12c of the L-shaped rotating rod 12. The connecting arm 11 of the portion 3 also constitutes a link mechanism that is rotatably connected by a shaft 14, and the vertical sliding cylinder 9 is externally fitted to the sliding support shaft 6 so as to be movable up and down. The distance D1 between the upper surface of the two side plates 5b and the upper surface of the lifting base 10 is kept at a minimum distance and is not further reduced. As shown in FIG. 14, this distance D1 can be made smooth by setting the distance between the upper and lower portions of the recess B, which is a hole for insertion of a heat insulating material or the like formed on the end surface of the stacked building board A. Work can be done. When the usage range of the lifting tool 1 for a building board is applied to a small building board A, it can be dealt with by designing the minimum distance D1 to be small.

  In order to adjust the distance D1 to the distance between the upper and lower recesses B of the laminated building material A, it is possible to pull the movable handle 13 in the direction of the arrow shown in FIG. . When pulled, the vertical moving part 3 is operated in the direction in which the link mechanism by the three shafts 14, 16, 17 works so that the vertical sliding cylinder 9 rises along the sliding support shaft 6, and conversely, the movable handle 13 is separated from the operator. If the support handle 7 is pushed and rotated, the distance of D1 is reduced by the same link mechanism. After the distance between D1 and the distance between the two upper and lower recesses B are substantially matched in this way, the tops of the lifting base 10 and the base 5 are inserted into the upper and lower recesses B as shown in FIG. At this time, holding the support handle 7 with one hand and the movable handle 13 with the other hand and pulling the movable handle 13 in the direction of the operator himself, the distance D1 is increased to a distance D2 shown in FIG. The upper table 10 contacts the upper inner surface of the recess B of the upper building plate A, and the back surface of the bottom plate 5a of the base 5 contacts the lower inner surface of the recess B of the lower building plate A. When the movable handle 13 is further pulled forward, the distance D3 shown in FIG. 11 is obtained, and a gap L is formed between the upper and lower building plates A as shown in FIG.

  At this time, as shown in FIG. 11, when the movable handle 13 is pulled to the operator's direction to the maximum extent, it forms a substantially right angle with the support handle 7 and stops. In this state, even when the load of the building plate A is applied above the lifting base 10, the vertical sliding cylinder 9 is slid on the sliding support shaft 6 and dropped due to the reasons described above. Does not occur. That is, in FIG. 11, when a load is applied to the lifting platform 10, the vertical sliding cylinder 9 tends to slide downward due to the load. The horizontal rod 12b of the L-shaped pivot rod 12 and the coupling rod 15 that are pivotally coupled by the bent are bent in the shape of a "<" instead of a straight line in the vertical direction. It abuts against the dynamic support shaft 6 and stops rotating due to the load. Thus, even if the load of the building plate A is applied to the lifting platform 10 and the vertical sliding cylinder 9, it does not slide down. This stable state that does not slide off is when the movable handle 13 is pulled to the end in the direction of the operator. Thus, the operator can release both hands from the support handle 7 and the movable handle 13.

As another means for preventing this sliding, the load applied to the lifting base 10 is applied to the vertical sliding cylinder 6 as an unbalanced load by reducing the vertical width of the vertical sliding cylinder 6. Although it is possible to be transmitted and to be locked by sliding friction with respect to the vertical sliding support shaft 6, it is not very suitable because it lacks stability.

  The force for pulling the movable handle 13 toward the worker side to lift the building plate A as described above is the tip of the movable handle 13 from the shaft 14 that rotatably fixes the intersection 12c and the connecting arm 11 by the lever principle. Therefore, the length of the movable handle 13 is made sufficiently larger than the length of the lifting base 10, so that the building board A can be lifted even with a small force. Work becomes easier.

  As described above, when the gap L is formed between the two adjacent upper and lower building boards A stacked, the lifting aid C such as a hanging string or a hanging bracket is inserted therethrough. When lifting, as shown in FIG. 15, it is necessary to pass the lifting aid C on both sides in the longitudinal direction, so the same operation is repeated one by one at both ends of one sheet of building material A, and two lifting aids Insert C. In the figure, the case where one building board A is lifted by a crane with a hanging strap is described, but the same work can be performed when a plurality of building boards A are lifted.

  As is clear from the above description, according to the building board lifting tool 1 of the present invention, the end portion of the building board A can be lifted up by a simple operation, and the lifting base 10 and the movable handle 13 can be lifted. By increasing the length ratio, work can be done easily with less force. Further, since the movable handle 13 is lifted by pulling it toward the operator side, it is easier to apply force than opening it in the lateral direction. Furthermore, since the gap L can be maintained as it is even if both hands are released from the two handles 7 and 13 with the gap L between the ends of the upper and lower building plates A being opened, the lifting assist is provided in the opened gap L. The same operator can insert the tool C, saving labor.

  The building board lifting tool of the present invention can be used for lifting construction board materials for all buildings, regardless of whether it is a high-rise building or a low-rise building. Demand is expected.

DESCRIPTION OF SYMBOLS 1 Construction board lifting tool 2 Tool main body part 3 Vertical movement part 4 Movable handle part 5 Base 6 Sliding support shaft 7 Support handle 9 Vertical sliding cylinder 10 Lifting base 11 Connecting arm 12 L-shaped rotary rod 12a Vertical rod 12b Horizontal杆 13 Movable handle 14, 16, 17 Shaft 15 Linkage 杆

Claims (5)

A vertical lifting member supported by the tool main body so as to be movable in the vertical direction moves up and down by operation of the movable handle, so that the vertical moving member lifts the end of the structural plate. Because
The tool body has a sliding support shaft provided with a support handle at a substantially central portion of the pedestal.
The vertical moving part includes a vertical sliding cylinder that moves up and down while being guided by being externally fitted to the sliding support shaft, and a lifting base that moves up and down together with the vertical sliding cylinder and lifts an end of the building member And a connecting arm,
The movable handle portion is configured such that an intersection of a vertical hook and a horizontal hook of an L-shaped rotary hook provided with a movable handle is rotatably connected to the connecting arm, and an end of the horizontal hook is connected via the connecting hook. A lifting tool for a building board, which is pivotably connected to a pedestal.   The linear distance between the axis of the intersection of the L-shaped rotary rod and the axis provided on the side plate of the pedestal is the distance between the axis of the intersection of the L-shaped rotary rod and the axis provided at the tip of the horizontal rod. The building board lifting tool according to claim 1, wherein the lifting tool is shorter than a sum of distances between a shaft provided at a tip portion of the horizontal rod and a shaft provided on a side plate of the pedestal. 3. The connection arm according to claim 1, wherein the two connection arms are provided so as to protrude in parallel from the vertical sliding portion with an interval of the width of the intersecting portion of the movable handle portion. tool lifting of the Building for the plate material.   The lifting tool for a building board material according to any one of claims 1 to 3, wherein the sliding support shaft and the vertical sliding cylinder externally fitted to the sliding support shaft have a quadrangular cross-sectional shape. .   The building plate lifting tool according to any one of claims 1 to 4, wherein the movable handle is bent toward the pull side.

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