JP6739788B2 - Lifting bracket - Google Patents

Description

The present invention relates to a lifting metal fitting used for lifting a heavy object such as an expansion joint.

For example, since an expansion joint that is placed between a building with a seismic isolation structure and an adjacent artificial ground is a heavy object, it can be lifted and carried by multiple workers during loading and unloading work or construction. Be carried or lifted by equipment such as a crane. Here, when the work is performed by the human power of the worker, it is necessary to have about four to six workers, and there is a risk of injury if it is accidentally dropped. There was a problem with sex. On the other hand, the work using a crane or the like is suitable as compared with the human power of the worker because the above-mentioned safety problem does not occur. In the work using a crane or the like, it has been necessary to attach a metal fitting such as an eye bolt for connecting the hook of the crane to the expansion joint. As such an eyebolt, for example, the one proposed in Patent Document 1 can be applied.

JP 2001-99123 A

By the way, in order to attach the above-mentioned eye bolt to a lifting object such as an expansion joint (hereinafter referred to as a suspended upper body), a mounting hole for mounting the eye bolt is formed in the suspended upper body, and the mounting hole is formed in the mounting hole. Attach the eyebolt so that it can be detached. This eyebolt is generally attached at the time of loading/unloading work or construction work of the suspended upper body, and is generally removed after being installed in the construction work. For this reason, since the suspended upper body remains with the mounting hole open after the construction, there is a problem that the mounting hole lowers the strength and the rigidity. Furthermore, since the suspended upper body such as the expansion joint has a relatively large size, it is necessary to mount a plurality of eyebolts during the above-mentioned loading/unloading work or construction work, and accordingly Since the number of eyebolt mounting holes increases, the problems of reduced strength and reduced rigidity tended to become more apparent. For this reason, there has been a demand for a metal fitting such as an eyebolt that can be detachably attached without causing the above-described reduction in strength or rigidity of the suspended upper body.

The present invention proposes a lifting metal fitting that can be detachably attached to a suspended skeleton such as an expansion joint without lowering the strength of the suspended skeleton.

According to the present invention, an upper opening is formed between both upper wall portions, each of which includes side wall portions facing each other at a predetermined interval and upper wall portions extending inward from upper edges of both side wall portions. A long-shaped locked portion is detachably attached to one or a plurality of suspended skeletons, and a suspension member is coupled to the suspended member in a disengageable manner. And an operating member comprising a female screw portion provided in the connecting portion and provided with a screw hole opening downward, and the upper opening portion screwed into the screw hole of the female screw portion. A male threaded rod that can be inserted, and an insertion position that is disposed at the lower end of the male threaded rod and that can be inserted through the upper opening with the male threaded rod as a rotation axis, and the upper opening cannot be inserted through both sides. An engaging member comprising a lower support plate that is rotated to a locking position for locking the locking ends formed on the edges to both side walls of the locked part, respectively; An insertion hole for inserting the male screw rod of the mating member is provided, and is a flat plate-like board which is interposed between the operating member and the engaging member and placed on the upper wall portion of the locked portion. A mounting support plate, the lower support plate of the engaging member inserted from above into the upper opening of the locked portion is at the locking position, and the mounting support plate is the upper wall portion. In the state of being placed on the upper side, the upper wall portion is formed by the lower support plate and the mounting support plate through the tightening action of the female screw portion and the male screw rod by the turning operation of the operation member. It is a metal fitting for lifting, characterized in that it is sandwiched and engaged with the body to be hung.

According to such a configuration, unlike the above-mentioned eyebolt, it can be detachably attached to the locked portion of the suspended upper body without forming a mounting hole or the like in the suspended upper body. The above problems such as deterioration and rigidity are not caused. In the lifting metal fitting of this configuration, after the lower support plate of the engaging member is inserted through the upper opening of the locked portion with the lower support plate as the insertion position, the lower support plate is rotated about the male screw rod as a rotation axis. Move it to the locked position. Then, with the lower support plate in the locked position and the riding support plate placed on the upper wall portion of the locked portion, the operation member is rotated to move the upper wall portion. The lower support plate and the riding support plate are sandwiched and attached to the locked portion. By connecting a lifting member such as a hook of a crane to the connecting portion of the lifting metal fitting attached to the locked portion in this way, the suspended body can be lifted and carried. On the other hand, at the time of removal, the operation member is rotated in the opposite direction to release the tightening between the lower support plate and the mounting support plate, and the lower support plate is set to the insertion position. Then, by pulling out the lower support plate from the upper opening, the lifting metal fitting can be removed from the suspended frame. As described above, the lifting metal fitting of the present invention can be easily attached to and removed from the suspended upper body, and can be relatively firmly attached to the locked portion of the suspended upper body. Therefore, since the suspended upper body can be stably carried by using a crane or the like in a state of being attached to the suspended upper body, the work efficiency of the loading/unloading work and the construction work of the suspended upper base can be improved. Can improve.

In the lifting metal fitting of the present invention described above, the lower support plate of the engaging member is provided with inclined side edges that are inclined at a predetermined angle with respect to the longitudinal direction of the locked portion at the insertion positions on both side edges. In addition, a configuration is proposed in which a locking end portion is formed by each inclined side edge and has a substantially parallelogram shape.

With this configuration, the inclined side edges of the lower support plate are stably locked to both side wall portions of the locked portion at the locking position, and the lower support plate is easily and accurately positioned at the locking position. it can. Therefore, by rotating the operating member, the upper wall portion of the locked portion can be more firmly held between the lower support plate and the riding support plate.

Here, it is preferable that the inclined side edge of the lower support plate has a predetermined angle with respect to the longitudinal direction of the locked portion at the insertion position that is substantially the same as the angle between the insertion position and the locking position. .. According to this configuration, when the lower support plate is set to the locking position, both inclined side edges (locking end portions) are brought into contact with both side wall portions of the locked portion as a whole and locked, The lower support plate can be held more stably at the locking position.

In the above-described lifting metal fitting of the present invention, the mounting support plate is provided at an upper opening portion of the locked portion which is projected downward at predetermined intervals in the longitudinal direction of the locked portion. A configuration is proposed, which is provided with a fitting protrusion that can be fitted, and in which the lower support plate of the engaging member is disposed between the fitting protrusions at the locking position.

According to this structure, by fitting the fitting protrusion into the upper opening, the mounting support plate can be easily and stably positioned on the upper wall, and is stably held at that position. Further, since the lower support plate is disposed between the fitting protrusions at the locking position, the lower support plate is unlikely to be displaced from the locking position by the operation of rotating the operating member, and is stable at the locking position. Easy to hold. In this way, since the mounting support plate can be positioned and held on the upper wall portion and the lower support plate can be held at the locking position, the lower support plate and the mounting support plate can be rotated by the operation member. The upper wall portion can be more stably sandwiched, and the sandwiched state can be more stably held.

Since the lifting metal fitting of the present invention can be detachably attached to the suspended upper body without forming a mounting hole in the suspended upper body as in the case of using the conventional eyebolts described above, the attachment hole can be attached. The reduction in strength and the reduction in rigidity caused by the formation of Further, according to this configuration, the lower support plate is inserted through the upper opening and the operation member is pivotally operated, so that the lower support plate can be easily and stably attached to the locked portion of the suspended upper body. Therefore, the work of attaching (and the work of removing) to the locked portion can be easily performed, and the burden of the work can be reduced as much as possible.

It is a top view which shows the construction state of the expansion joint 51. (A) It is the XX sectional view taken on the line in FIG. 1, and (B) is an enlarged view of the Y section. It is (A) front view and (B) top view of the metal fitting 1 for hoisting of this example. It is a front view which decomposes|disassembles and shows the metal fitting 1 for suspension. (A) A bottom view of the mounting support plate 4 and (B) a bottom view of the engagement member 3. It is explanatory drawing which shows the aspect which inserts the metal fitting 1 which made the lower support plate 15 the insertion position into the upper opening part 59 of a pair of rod members 58,58. FIG. 6A is a front view and FIG. 4B is a plan view showing a state in which the lifting metal fitting 1 having the lower support plate 15 as an insertion position is inserted into the upper opening 59. It is the front view (A) and the top view (B) which show the state which attached the metal fittings 1 for lifting which made the lower support plate 15 the locking position to the pair of rod members 58,58.

Embodiments according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows an expansion joint 51 corresponding to the suspended upper body of the present invention. The expansion joint 51 is arranged so as to cover the joint 63 provided between the adjacent buildings 61 and 62. Here, one building 61 is a building having a seismic isolation structure whose lower portion is supported by a seismic isolation device (not shown) having a cushioning function, and the other building 62 is the building 61. It is a building made of artificial ground formed around the building, and a building 61 and a building 62 are adjacent to each other via a joint 63. In this embodiment, the width direction of the joint 63 is the longitudinal direction of the expansion joint 51, and the lateral direction orthogonal to the longitudinal direction is the width direction of the expansion joint 51.

In the expansion joint 51, one end 52 in the longitudinal direction is connected to one building 61 via a connecting means, and the other end 53 is slidable on the side edge of the other building 62. Will be loaded. Here, the connecting means between the one end 52 of the expansion joint 51 and the building 61, and the mode of mounting the other end 53 of the expansion joint 51 on the side edge of the building 62 are generally used. Since the configuration described above can be applied, its details are omitted.

The expansion joint 51 is configured by a shallow-bottomed rectangular main housing portion 56 having an open top surface, and a bottom plate portion (not shown) of the main housing portion 56 has a long reinforcing rod 57 as a width. Plural are installed in parallel in the direction. The reinforcing rods 57 are arranged along the longitudinal direction of the expansion joint 51 and fixed to the bottom plate portion by welding, respectively, and improve the strength and rigidity of the expansion joint 51. In addition, such an expansion joint 51 is filled with the same paving material as the paving material such as mortar or tiles laid on the floors of the buildings 61 and 62 at the time of construction ( (Not shown).

As shown in FIG. 2, the above-mentioned reinforcing rods 57 are rod-shaped members 58, 58 having substantially U-shaped cross-sections. The members 58, 58 are arranged so as to face each other. The rod members 58, 58 constituting the reinforcing rod 57 are each composed of a side wall portion 58a, an upper wall portion 58b and a lower wall portion 58c, and both side wall portions 58a, 58a are welded. The lower wall parts 58c, 58c are welded to the main housing part 56. In the opposing rod members 58, 58 of the adjacent reinforcing rods 57, 57 arranged in this way, the respective side wall portions 58a, 58a face each other at a predetermined interval, and the upper wall portions 58b, 58b are also separated from each other. An upper opening 59 is formed along the longitudinal direction. Here, the width of the upper opening portion 59 (the distance between the upper wall portions 58b, 58b) is narrower than the distance between the side wall portions 58a, 58a facing each other, and the size and distance of these widths are different from those of the upper opening portion 59. The width (the interval between the upper wall portions 58b, 58b) is defined by the position where the reinforcing rod 57 is arranged, the size of the reinforcing rod 57, and the like.

In this embodiment, the rod members 58, 58 of the adjacent reinforcing rods 57, 57 facing each other constitute the locked portion 60 according to the present invention. The rod members 58, 58 forming the unit 60 will be described as a pair. That is, the locked portion 60 is composed of a pair of rod members 58, 58 of the adjacent reinforcing rods 57, 57 that face each other.

Next, the lifting metal fitting 1 according to the main part of the present invention will be described.
As shown in FIGS. 3 and 4, the lifting metal fitting 1 includes an operation member 2, an engagement member 3, and a mounting support plate 4. The operation member 2, the engagement member 3, and the mounting support plate 4 are made of stainless steel. The operation member 2 includes a substantially annular connecting portion 11 that can be connected to a hook such as a crane, and a female screw portion 12 provided with a screw hole 13 that opens downward, and a female screw is provided at a lower end portion of the connecting portion 11. The upper end of the portion 12 is integrally arranged. A hook such as a crane connected to the connecting portion 11 corresponds to a hoisting member according to the present invention, and a rope, a band-shaped band, or the like can be applied to the hoisting member in addition to the hook.

The above-mentioned engaging member 3 is provided with a flat lower support plate 15 and a male screw rod 16 which is erected upward from substantially the center of the lower support plate, and the lower support plate 15 and the male screw rod 16 are provided. Are integrally provided. The male screw rod 16 is configured such that a bolt to be screwed into the screw hole 13 of the female screw portion 12 of the operation member 2 described above is fitted into a hole (not shown) opened in the lower support plate 15 to support the lower support. It is formed by being integrated with the plate 15 by welding. The outer diameter of the male screw rod 16 is smaller than the width of the upper opening 59 described above, so that the upper opening 59 can be inserted therethrough. On the other hand, as shown in FIG. 5B, the lower support plate 15 has a substantially parallelogram shape including two long sides parallel to each other and two short sides parallel to each other inclined with respect to the long sides. The distance between the two long sides is set to a predetermined dimension that is slightly shorter than the width of the upper opening 59 described above. The lower support plate 15 can be inserted through the upper opening 59 by arranging its long sides along the longitudinal direction of the upper opening 59 (see FIGS. 6 and 7). The position where such long sides are arranged along the longitudinal direction of the upper opening 59 is the insertion position according to the present invention. Further, the lower support plate 15 has a long side dimension set to a predetermined dimension longer than the distance between the side wall portions 58a and 58a of the pair of rod members 58 and 58 facing each other. Therefore, when the lower support plate 15 is arranged between the side wall portions 58a, 58a of the pair of rod members 58, 58 and is rotated about the male screw rod 16, the both side edges of the lower support plate 15 become The side walls 58a, 58a come into contact with the side walls 58a and 58a so that the side walls 58a, 58a cannot rotate any more (see FIG. 8). Then, the two short sides which are both side edges of the lower support plate 15 form inclined side edges 21 and 21 which are inclined at a predetermined inclination angle θ with respect to the long side. The inclination angle θ of the inclined side edge 21 with respect to the long side is the rotation angle δ (see FIG. 8) from the insertion position of the lower support plate 15 to the position where the lower support plate 15 comes into contact with the side wall portions 58a, 58a and becomes unrotatable. It is set to be substantially equal. The lower support plate 15 is rotated from the insertion position (see FIG. 7) by the rotation angle δ (=inclination angle θ) about the male screw rod 16 as a rotation axis, so that both the inclined side edges 21 and 21 are side walls. It abuts against the parts 58a, 58a (see FIG. 8). By this abutment, the lower support plate 15 cannot rotate any more and is locked by the pair of rod members 58, 58 (locked portion 60). At this locked position, since the lower support plate 15 is rotated from the insertion position, it cannot be inserted through the upper opening 59. Here, the direction in which the lower support plate 15 is rotated from the insertion position is, as shown in FIG. 3(B), the direction in which the male screw rod 16 and the screw hole 13 of the female screw portion 12 are screwed (the right screw In the case of a clockwise direction). In the present embodiment, the position where both the inclined side edges 21 and 21 of the lower support plate 15 are brought into contact with the side wall portions 58a and 58a and locked is the locking position according to the present invention (FIG. 8). reference). Further, the inclined side edge 21 corresponds to the locking end portion according to the present invention.

As shown in FIGS. 4 and 5(A), the mounting support plate 4 has a rectangular flat plate shape, and has a size and size in which the upper opening 59 between the pair of rod members 58, 58 cannot be inserted. (See FIG. 7). An insertion hole 25 through which the male screw rod 16 of the engaging member 3 is inserted is formed substantially at the center of the mounting support plate 4, and the insertion hole 25 is formed. Fitting protrusions 26, 26 projecting downward from the bottom surface are provided at predetermined intervals on both sides of, respectively. The fitting protrusions 26, 26 are provided with an upper opening between the upper wall portions 58b, 58b when the riding support plate 4 is placed on the upper wall portions 58b, 58b of the single rod members 58, 58. It is provided so as to be fitted into the portion 59 and project downward from the upper wall portions 58b, 58b (see FIG. 7). Specifically, the fitting protrusion 26 has a width dimension that is slightly shorter than the width of the upper opening 59 in a state in which the mounting support plate 4 is mounted on the upper wall portions 58b and 58b, and the upper wall portion 58b has a width dimension slightly smaller than that of the upper opening portion 59. It is formed in a rectangular plate shape having a height dimension longer than the plate thickness of the portion 58b. Further, with the riding support plate 4 placed on the upper wall portions 58b, 58b, the lower support plate 15 at the locking position can be arranged between the fitting protrusions 26, 26. Further, the interval between the fitting protrusions 26, 26 is set (see FIG. 3(B)).

In the present embodiment, the lower support plate 15 of the engaging member 3 is provided with thin plate-like rubber packings 19 on both sides of the upper surface thereof. Further, the mounting support plate 4 is provided with thin plate-like rubber packings 29 on both sides of the lower surface thereof. As a result, when the upper wall portions 58b and 58b are sandwiched between the lower support plate 15 and the riding support plate 4 as described later, the packing 19 is provided between the lower support plate 15 and the upper wall portions 58b and 58b. The packing 29 is interposed between the riding support plate 4 and the upper wall portions 58b, 58b.

In the lifting metal fitting 1, the male screw rod 16 of the engaging member 3 is inserted into the insertion hole 25 of the mounting support plate 4 from below and screwed into the screw hole 13 of the female screw portion 12 of the operation member 2. To be done. Here, the mounting support plate 4 is freely fitted in the male screw rod 16 and is rotatable.

Next, a usage mode of the above-described lifting metal fitting 1 of the present embodiment will be described.
For example, when loading and unloading the expansion joint 51 on a loading platform such as a truck, the lifting metal fitting 1 is attached to the reinforcing rod 57 arranged on the expansion joint 51. As shown in FIGS. 6 and 7, in the lifting metal fitting 1, the lower support plate 15 of the engaging member 3 is provided with a pair of rod members 58, 58 (engaged portions) constituted by adjacent reinforcing rods 57, 57. The upper opening 59 is inserted through the upper opening 59 from above as the insertion position along the longitudinal direction of the upper opening 59. Then, the mounting support plate 4 is placed on the upper wall portions 58b, 58b of the pair of rod members 58, 58. At this time, the mounting support plate 4 is positioned by fitting the fitting protrusions 26, 26 into the upper opening 59.

After that, as shown in FIG. 8, the operation member 2 is rotated clockwise to rotate the lower support plate 15 of the engagement member 3 from the insertion position to the locking position, so that both of the lower support plates 15 are rotated. The inclined side edges 21 and 21 are brought into contact with and locked by the side wall portions 58a and 58a of the pair of rod members 58 and 58, respectively. Further, by rotating the operating member 2 in the clockwise direction, the male screw rod 16 of the engaging member 3 is screwed into the screw hole 13 of the operating member 2 and is moved upward to engage. The lower support plate 15 of the member 3 is pressed against the upper wall portions 58b, 58b. In this way, the upper wall portion 58b is formed by the lower support plate 15 and the mounting support plate 4 of the engaging member 3 through the tightening action of the male screw rod 16 of the engaging member 3 and the screw hole 13 of the operating member 2. , 58b are clamped, and the lifting metal fitting 1 is attached to the pair of rod members 58, 58 (locked portions 60).

The lifting metal fitting 1 is relatively firmly held in the state of being attached to the pair of rod members 58, 58 as described above. This is because the riding support plate 4 holding the upper wall portions 58b, 58b is positioned by the fitting projections 26, 26, and the held lower support plate 15 is a side wall by the inclined side edges 21, 21. This is because it is locked to the portions 58a, 58a.

By connecting a hook of a crane or the like to the connecting portion 11 of the lifting metal fitting 1 attached to the reinforcing rod 57 in this way, the expansion joint 51 can be lifted and loaded and unloaded. Similarly, the expansion joint 51 that has been unloaded from the loading platform can be moved by a crane or the like even during the construction in which the expansion joint 51 is arranged at the joint 63 between the buildings 61 and 62 described above.

In addition, when the above-mentioned loading/unloading work or construction work is completed, the operating member 2 of the lifting metal fitting 1 is rotated counterclockwise, whereby the male screw rod 16 of the engaging member 3 and the operating member 2 are rotated. The lifting metal fitting 1 can be removed from the pair of rod members 58, 58 by releasing the tightening from the screw hole 13 and further taking out the lower support plate 15 from the upper opening 59 at the insertion position. In this way, the lifting metal fitting 1 can be detachably attached to the reinforcing rod 57 of the expansion joint 51, and the attachment work and the removal work can be performed relatively easily.

Further, the lifting metal fitting 1 is adapted to rotate the lower support plate 15 from the insertion position to the locking position by rotating the operation member 2 in the clockwise direction at the time of mounting, and erroneously rotates in the counterclockwise direction. If it is rotated, the inclined side edges 21 and 21 cannot contact the side wall portions 58a and 58a, and the locking becomes insufficient. Since the lower support plate 15 is not arranged between the fitting projections 26, 26 of the mounting support plate 4, the upper wall parts 58b, 58b cannot be sandwiched between the lower support plate 15 and the mounting support plate 4. As described above, in this embodiment, if the operating member 2 is erroneously rotated counterclockwise, it cannot be attached to the pair of rod members 58, 58, so that the operator is urged to perform normal attachment. It also has excellent advantages.

Further, according to the lifting metal fitting 1 of the present embodiment, it is necessary to perform processing (such as forming a hole) for attaching the lifting metal fitting 1 to the main housing portion 56 of the expansion joint 51, the reinforcing rod 57 and the like. Therefore, the strength and the rigidity of the main housing portion 56 and the reinforcing rod 57 are not reduced by the processing. In this way, the lifting metal fitting 1 can be removably attached without the strength and the rigidity of the expansion joint being lowered as in the case of using the conventional eyebolts described above.

The present invention is not limited to the above-described embodiment, and configurations other than this embodiment can be appropriately modified and implemented within the scope of the gist of the present invention.
In the present embodiment, the suspended skeleton body to which the suspending metal fitting 1 is attached is exemplified by the expansion joint 51, but the invention is not limited to this, and the locked portion (opposed side wall portion and upper wall portion) is provided. If so, the lifting metal fitting 1 can be similarly used.

DESCRIPTION OF SYMBOLS 1 Lifting metal fitting 2 Operation member 3 Engagement member 4 Mounting support plate 11 Connection part 12 Female screw part 13 Screw hole 15 Lower support plate 16 Male screw rod 21 Sloping side edge (locking end part)
25 insertion hole 26 fitting protrusion 51 expansion joint (suspended upper body)
58a Side wall 58b Upper wall 59 Upper opening 60 Engaged part

Claims (3)

A long opening having an upper opening formed between both upper wall portions, which are provided with side wall portions facing each other at a predetermined interval and upper wall portions extending inward from upper edges of both side wall portions. A scale-shaped locked portion is detachably attached to one or a plurality of suspended upper bodies,
An operating member comprising a connecting portion to which the hoisting member is detachably connected, and a female screw portion provided in the connecting portion and provided with a screw hole opening downward,
A male screw rod that is screwed into a screw hole of the female screw part and that can be inserted through the upper opening, and a male screw rod disposed at the lower end of the male screw rod. And a locking position where the upper opening cannot be inserted and the locking ends formed on both side edges are locked on both side walls of the locked part, respectively. An engaging member including a lower support plate,
A flat plate shape having an insertion hole through which the male screw rod of the engagement member is inserted, and is interposed between the operation member and the engagement member and placed on the upper wall portion of the locked portion. It is equipped with a mounting support plate of
In a state where the lower support plate of the engaging member, which is inserted from above into the upper opening of the locked portion, is in the locking position, and the riding support plate is placed on the upper wall portion, Through the tightening action of the female screw portion and the male screw rod by the turning operation of the operation member, the upper wall portion is sandwiched between the lower support plate and the mounting support plate, and the suspended upper body is attached. A lifting metal fitting characterized in that it is engaged. The lower support plate of the engaging member has a substantially parallelogram shape in which both side edges are provided with inclined side edges that incline at a predetermined angle with respect to the longitudinal direction of the locked portion at the insertion position. The lifting metal fitting according to claim 1, wherein the locking end portions are configured respectively. The mounting support plate is provided with fitting protrusions that are respectively protruded downward at predetermined intervals in the longitudinal direction of the locked portion and that can be fitted into the upper openings of the locked portion.
The lifting metal fitting according to claim 1 or 2, wherein the lower support plate of the engaging member is arranged between the fitting protrusions at the locking position.

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