JP7212364B2 - Distributor - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act On April 23, 2019, at the head office factory of Taiyu Co., Ltd., it was published at the distributor's driving test in the presence of the person in charge of the customer Nagahama Sangyo Co., Ltd.

The present invention relates to a distributor used for placing concrete.

For example, when placing concrete in the construction of a large concrete structure, a distributor supports a concrete pumping pipe with a boom that can be swiveled and undulated, and pours concrete at the desired position by swiveling and bending the boom. is used.

A distributor using a winch for reeling out and winding up a wire rope is known (see, for example, Patent Document 1). A conventional distributor will be described with reference to FIG.

As shown in FIG. 10, a swivel base 103 is rotatably mounted on a swivel bearing 102 provided on a base 101, and the base of a boom 105 is attached to the swivel base 103 so as to be able to rise and fall.

The boom 105 has a parent boom 105a whose base is attached to a swivel base with a bearing 104 so that it can be raised and lowered, and a bearing 109 which is attached to a position near the tip side of the parent boom 105a so that it can be raised and lowered vertically. It is composed of a child boom 105b. The parent boom 105a and child boom 105b can be folded to overlap each other.

Two winches 110 and 111 and a support frame 113 with a pulley 112 attached to the top thereof are provided on the swivel base 103 . The leading end of the parent boom 105a is supported by a wire rope 114 pulled out from a winch 110 for raising and lowering the parent boom.

The hoisting angle of the parent boom 105a is controlled by the winch 110 and the wire rope 114 .

The tip of the wire rope 116 pulled out from the sub-boom hoisting winch 111 is connected to the sub-boom 105b. By operating the winch 111, the child boom 105b can be raised and lowered with respect to the parent boom 105a.

The concrete pumping pipe 119 passes along the axis of the swivel bearing 102 from the bottom to the top, and is arranged along the main boom 105a and the sub-boom 105b so that the boom 5 can be undulated and bent without hindrance. there is A flexible hose 122 is connected to the distal end of the concrete pumping pipe 119, and is held in a suspended state along a guide 123 attached to the sub-boom 105b.

To place concrete using the distributor described above, the sub-boom 105b is positioned at the tip of the main boom 105a and supported by the wire rope 116. The flexible hose 122 is suspended from the guide 123 of 105b, and concrete pumped from a concrete pump (not shown) is driven into the floor surface. By rotating the swivel base 103 and raising and lowering the booms 105a and 105b, it is possible to place concrete within the range of radius drawn by the tip of the boom 105 with the swivel bearing 102 as the center.

The placement position and placement height of concrete can be freely changed by operating the winches 110 and 111 to raise, lower, and bend the booms 105a and 105b.

The above distributor is transported to the construction site by truck or trailer. When a truck or trailer is used to travel on public roads, the width, height, length, etc. of the vehicle are restricted by law. That is, the height is limited to 3.8m, the width is limited to 2.5m, and the length is limited to 12m in the case of tracks.

JP-A-59-80864

When the distributor is loaded on a truck or trailer, the height from the ground to the tip of the support frame 113 may exceed the legal height limit.

Conventionally, the distributor support frame 113 is fixed to the swivel base 103 using bolts and nuts. Therefore, when the height limit is exceeded, the support frame 113 is removed from the swivel base 103 after the wire ropes 114 and 116 are removed from the pulley 112 at the tip of the support frame 113 . With the support frame 113 removed from the swivel base 103, the distributor is loaded on a truck or trailer and transported.

As described above, in the conventional distributor, it is necessary to dismantle the support frame during transportation and load the dismantled support frame on the truck or trailer. Therefore, in the conventional distributor, there is a problem that work such as dismantling the support frame and loading work is troublesome.

Therefore, when the distributor is loaded on a truck or trailer, if the height from the ground to the tip of the support frame exceeds the legal height limit, the support frame can be easily removed. To provide a distributor that can be folded to the boom side to be within the height limit.

A distributor according to the present invention comprises a swivel base, a parent boom having a base end attached to the swivel base so that it can be raised and lowered, and a child boom attached to a tip end of the main boom so that it can be raised and lowered relative to the main boom. a first wire rope pulled out from a first winch and connected to the parent boom; a second wire rope pulled out from a second winch and connected to the child boom; and the first wire rope. and a pulley on which a second wire rope is stretched is attached to the tip, a support frame provided on the swivel base, and a concrete supply pipe supported by the parent boom and the child boom, and the first A distributor in which the raising and lowering motions of the parent boom and the child boom are controlled by the wire rope payout and winding actions of the winch and the second winch, wherein the support frame is positioned between the base end and the tip end of the parent boom. a first support member attached to the swivel base so as to be swingable in a direction connecting the two, and a first support member attached to the swivel base so as to be swingable in a direction connecting the two, and being detachably attached to the swivel base. and a second support member, wherein the first support member and the second support member are foldable toward the parent boom.

According to the above configuration, the second support member can be removed from the swivel base, and the first support member can be folded by simply rotating toward the main boom, thereby improving workability.

Further, the present invention can be configured to include a reinforcing bar that is swingably attached to the first support member or the second support member and connects between the first support member and the second support member.

Sufficient strength can be obtained for the triangular frame that serves as the support frame by the reinforcement crosspiece.

Further, the first support member and the second support member may be folded toward the parent boom while the first wire rope and the second wire rope are stretched over the pulley. .

With the first wire rope and the second wire rope stretched over the pulley, the first support member and the second support member are folded toward the parent boom to remove and stretch the wire rope. work can be omitted, and workability is improved.

The first support member is swingably attached to a mounting portion provided on the swivel base, and the mounting portion is positioned above the parent boom when the parent boom is at the lower limit position. It should be configured as follows.

According to the above configuration, the main boom can be folded with the first support member and the second support member superimposed on the main boom.

Also, the main boom may be provided with a lowering arm attached to the swivel base.

By connecting the main boom and the swivel base with a lowering arm, the main boom can be supported at the lowering position during suspension by a crane or the like and during transportation.

Also, during storage and transportation by truck or the like, it is preferable to raise a receiving table (not shown) from the mounting surface to support the tip of the main boom at the lower limit position.

According to the distributor according to the present invention, the support frame can be folded toward the boom side with a simple operation so that the height is within the limit. As a result, it is possible to reduce the work time required for the dismantling work before transportation and the assembly work after transportation.

1 is a front view showing a distributor according to an embodiment of this invention; FIG. 1 is a top view showing a distributor according to an embodiment of the invention; FIG. FIG. 4 is a left side view showing a triangular frame (supporting frame) portion of the distributor according to the embodiment of the invention; FIG. 4 is a front view showing a housing state in which a child boom is bent with respect to a parent boom of the distributor according to the embodiment of the present invention; Fig. 2 is a front view showing an enlarged triangular frame portion of the distributor according to the embodiment of the present invention; FIG. 4 is a front view showing a state in which the triangular frame of the distributor according to the embodiment of the invention is folded; FIG. 4 is an enlarged front view of the distributor according to the embodiment of the present invention in a state where the triangular frame is folded; FIG. 4 is a top view of the distributor according to the embodiment of the present invention, with the triangular frame folded. FIG. 4 is a front view of the distributor according to the embodiment of the present invention, with the triangular frame folded. FIG. 11 is a front view showing a conventional distributor;

A distributor 60 according to the present invention will be described below with reference to the drawings. The distributor 60 according to the present invention is used, for example, for concrete casting work in constructing a large concrete structure such as a dam.

The distributor 60 supports the concrete pressure-feeding pipe 21 by means of a boom 5 that can freely turn and bend, and the boom 5 turns and bends to cast concrete at a desired position.

The hoisting motion of the boom 5 in this embodiment is performed using a wire rope and a winch. The distributor 60 of this embodiment will be described with reference to FIGS. 1 to 5. FIG.

As shown in FIG. 1, a swivel base 3 is rotatably mounted on a swivel bearing 2 provided on a base 1 . A boom 5 is attached to the swivel base 3 so that it can be raised and lowered.

The boom 5 includes a parent boom 5a having a base end 50a mounted on the swivel base 3 by means of a bearing 4 so as to be freely raised and lowered, and a bearing 19 at a position on the tip end 50d side of the parent boom 5a. It consists of a child boom 5b attached to the

The parent boom 5a and the child boom 5b can be folded so as to overlap each other, and the child boom 5b can be folded inside the parent boom 5a during transport.

The base 1 is formed into a rectangular frame when viewed from above, and has four legs 31 below. Outriggers 32 are attached to the four corners of the base 1 so as to be openable and closable. The outriggers 32 are folded along the base 1 when the distributor 60 is transported. Then, during the placing work, the outriggers 32 are arranged so as to extend from the base table 1, and the base table 1 is stably installed on the ground G.

Above the swivel base 3, there are provided two winches 10 and 11 and a triangular frame 13 as a support frame on which a pulley 12 is attached. The first winch 10 is used to hoist the parent boom 5a, and the second winch 11 is used to hoist the child boom 5b. A first wire rope 14a pulled out from the first winch is connected to the parent boom 5a, and a second wire rope 14b pulled out from the second winch 11 is connected to the child boom 5b.

The triangular frame 13 has a first support member 13a and a second support member 13b attached to the tip of the first support member 13a so as to be swingable. The base end of the first support member 13a is attached to the swivel base 3 so as to be swingable in the direction connecting the base end 50a and the tip end 50d of the main boom 5a.

The second support member 13b is fixed to a mounting plate 13q provided on the swivel base 3 using pins 13p. When folding the triangular frame 13, the second support member 13b can be removed from the mounting plate 13q of the swivel base 3 by removing the pin 13p, and can be hung from the first support member 13a.

The first support member 13a and the second support member 13b are connected by a reinforcing bar 13c. As shown in FIG. 5, in this embodiment, a reinforcing bar 13c is swingably attached to a mounting plate 13j provided substantially in the middle of the first support member 13a using an engaging pin 13m.

After fixing the second supporting member 13b to the swivel base 3, the first supporting member 13a is fixed by fixing the reinforcing bar 13c to the bar mounting member 13d provided at a substantially intermediate position of the second supporting member 13b with a pin 13n. and the second support member 13b, a triangular frame 13 as a support frame having an upper vertex as viewed from the front is provided on the swivel base 3. As shown in FIG.

As shown in the top view of FIG. 2 and the left side view of FIG. 3, the triangular frame 13 has a pair of first support member 13a and second support member 13b on the front side and the back side, respectively. A pair of first support members 13a are connected by a crosspiece 13e. When viewed from the left side, the pair of first support members 13a form a rectangular frame having a crosspiece 13e in the middle. It should be noted that illustration of the boom 5 is omitted in FIG.

A pulley 12 is provided at the tip of the triangular frame 13 . As shown in FIGS. 1 and 5, the pulley 12 is attached to the tip of the first support member 13a. A plate 13g having a hole 13f for suspending the triangular frame 13 is attached to the first support member 13a further to the tip side than the position where the pulley 12 is attached.

A plate 13h is provided below the position where the pulley 12 is attached to the first support member 13a, and the second support member 13b is swingably attached to the plate 13h using an engagement pin 13i.

The first support member 13a is swingably attached to a triangular frame 51 provided on the swivel base 3. As shown in FIG. The attachment portion 51a of the triangular frame 51 to which the first support member 13a is attached is positioned above the main boom 5a when the main boom 5a is at the lower limit position closest to the swivel base 3. As shown in FIG.

The first support member 13a is swingably attached to the attachment portion 51a by an engagement pin 51b.

When transporting the distributor 60 or the like, the main boom 5a is tilted toward the swivel base 3 so that the main boom 5a is at the lower limit position described above. In this embodiment, the lowering limit position of the parent boom 5a is a position where the parent boom 5a is substantially parallel to the ground G. As shown in FIG.

As will be described later, the present invention is configured such that the triangular frame 13 is folded toward the main boom 5a when the distributor 60 is transported. The mounting portion 51a is positioned above the main boom 5a when the main boom 5a is in the lower limit state. Therefore, when the triangular frame 13 is tilted toward the main boom 5a, the triangular frame 13 can be loaded while being superimposed on the main boom 5a.

As described above, the reinforcement bar 13c is connected between the first support member 13a and the second support member 13b. In this embodiment, a reinforcing bar 13c is attached to a plate 13j provided on the first support member 13a and a plate 13d provided on the second support member 13b.

In this embodiment, one end of the reinforcing bar 13c is pivotably attached to a plate 13j by an engaging pin 13m, and the other end of the reinforcing bar 13c is fixed to a bar mounting member 13d by a pin 13n.

Alternatively, the reinforcing bar 13c may be swingably attached to the second supporting member 13b and fixed to the first supporting member 13a using a pin.

Further, the reinforcing bar 13c may be detachable, and when the triangular frame 13 is folded, the reinforcing bar 13c may be detached from the first support member 13a and the second support member 13b.

The leading end of the parent boom 5a is supported by a wire rope 14a pulled out from one winch 10 for raising and lowering the parent boom.

The raising and lowering angle of the main boom 5a is controlled by the winch 10 feeding out and winding up the wire rope 14a. The wire rope 14a is sequentially wound from the pulley 12 on the support frame 13 to the pulley 15 provided at the tip portion 50d, and then the tip of the wire rope 14a is fixed to the first support member 13a.

The tip of the wire rope 14b pulled out from the sub-boom hoisting winch 11 is connected to the pulley 12 of the triangular frame 13, the pulley 16 attached to the tip 50d of the main boom 5a, the pulley 17 provided at the base of the sub-boom 5b, 18 and wound between pulleys 17 and 18 in turn. The tip of the wire rope 14b is fixed to an attachment member 18a to which the pulley 18 is attached. A tip portion of the mounting member 18 a to which the pulley 18 is attached and a tip portion 20 of the sub-boom 5 b are connected via a connecting member 22 . The winch 11 pays out and winds up the wire rope 14b so that the child boom 5b can be raised and lowered with respect to the parent boom 5a.

By operating the winches 10 and 11, the parent boom 5a and the child boom 5b can be freely moved in height and in the front-rear direction, as indicated by broken lines in FIG.

As shown in FIG. 2, the main boom 5a is composed of a pair of arms 50b, 50b that narrow toward the tip, and the base ends of the respective arms 50b, 50b are attached to the bearings 4 so that they can be raised and lowered. The arms 50b, 50b are connected to each other by a crosspiece 50c. A bearing 19 is attached to the tip of both arms.

As shown in FIG. 2, the width of the tip side of the parent boom 5a is narrower than the width of the triangular frame 13. As shown in FIG. When the triangular frame 13 is folded, the triangular frame 13 is configured to be placed over the parent boom 5a.

A lowering arm 35 is swingably attached to the main boom 5a. As shown in FIG. 4, the lowering arm 35 is rotated from the main boom 5a when the main boom 5a is in the lowering position, and is fixed to an attachment hole provided in the swivel base 3 using a pin 36. be done. By fixing the lowering arm to the swivel base 3, the main boom 5a is kept in the lowering state. By fixing the main boom 5a to the swivel base 3 with the lowering arm 35 during transportation, the shaking of the main boom 5a can be prevented.

A gear 41 provided on the shaft of the swivel base 3 meshes with a gear 40 a provided on a swivel motor 40 .

As shown in FIG. 2, the concrete pumping pipe 21 passes along the axis of the slewing bearing 2 from the bottom to the top, passes through the center of the bearing 4 and is pulled out of the main boom 5a in a horizontal state. After that, it advances parallel to the parent boom 5a, passes through the tip portion 50d on the way, and is arranged so as to be in a state parallel to the child boom 5b, so that the boom 5 can be raised and lowered and bent without hindrance. ing. The distal end of the concrete pumping pipe 21 is supported by the sub-boom 5b, and a flexible hose 24 connected to the distal end is held in a suspended state along a guide 23 attached to the sub-boom 5b.

In order to place concrete using the above-described distributor, the sub-boom 5b is positioned at the tip of the main boom 5a and supported by the wire rope 14b, and the flexible hose 24 at the tip of the concrete pumping pipe 21 is connected to the sub-boom. The boom 5b is suspended from a guide 23, and concrete pumped from a concrete pump (not shown) is driven through a flexible hose 24 into the floor. By rotating the swivel base 3 and raising and lowering the booms 5a and 5b, it is possible to place concrete within the range of radius drawn by the tip of the boom 5 with the swivel bearing 2 as the center.

The placement position and placement height of concrete can be freely changed by operating the winches 10 and 11 to raise, lower, and bend the booms 5a and 5b.

When transporting the distributor 60, the tip of the triangular frame 13 may exceed the height limit. Constructed to be within height limits.

Next, folding of the triangular frame 13 will be described with reference to FIGS. 4 to 9. FIG. As shown in FIGS. 4 and 5, the child boom 5b is bent inside the parent boom 5a. Then, the winch 10 is used to tilt the parent boom 5a to the lower limit position. The child boom 5b and the parent boom 5a are fixed by a suspension chain 61 or the like. In this embodiment, the lower limit position is the position where the parent boom 5a is parallel to the ground G.

The pin 36 of the lowering arm 35 attached to the main boom 5a is removed, the lowering arm 35 is fixed to the swivel base 3 with the pin 36, and the main boom 5a is fixed to the swivel base 3.

A wire rope is passed through the hole 13f of the tip plate 13g of the first support member 13a and supported by a crane. In this state, the pin 13p fixing the second support member 13b and the swivel base 3 is removed. Further, the pin 13n that fixes the reinforcing bar 13c and the second support member 13b is removed. Moreover, the wire ropes 14a and 14b are not removed from the pulley 12 while the wire ropes 14a and 14b are hung over the parent boom 5a and the child boom 5b. The wire ropes 14a and 14b are fixed by fixtures (not shown) in order to prevent the winches 10 and 11 from being randomly wound.

Subsequently, as shown in FIGS. 6 and 7, the first support member 13a is lifted by a crane (not shown) and rotated toward the tip of the main boom 5a. The second support member 13b and the reinforcing bar 13c, which are swingably attached to the first support member 13a, hang from the first support member 13a and rotate together with the first support member 13a.

Then, as shown in FIGS. 8 and 9, the first support member 13a is placed so as to overlap the main boom 5a. The second support member 13b and the reinforcing bar 13c overlap on the first support member 13a. At this time, the rotating end of the first support member 13a is located above the lowering limit position of the main boom 5a, so that the first support member 13a can be placed on the main boom 5a so as to overlap.

A wire rope or the like is used to fix the first support member 13a, the second support member 13b, and the reinforcing bar 13c placed on the main boom 5a.

Then, as shown in FIG. 8, the outriggers 32 are rotated along the base 1 and fixed. In this way, as shown in FIG. 9, the height (H) of the distributor 60 can be set within the restricted height that can be transported, and the width of the outriggers 32 can be adjusted along the base to reduce the restricted width. can be done within

As described above, to fold the triangular frame 13, the pin 13p of the second support member 13b and the pin 13n of the reinforcing beam 13c are removed, and the wire ropes 14a and 14b are hung on the pulley 12, the main boom 5a and the child boom 5b. The first supporting member 13a can be hung from a crane or the like while being handed over, and can be folded simply by rotating it toward the main boom 5a, thereby improving workability.

When the triangular frame 13 is erected on the swivel base 3 for the construction work after transportation to the construction site, the first support member 13a is rotated to the rear side of the main boom 5a by a crane or the like. , the second supporting member 13b is attached to the swivel base 3 with a pin 13p, and the reinforcing bar 13c is fixed to the second supporting member 13b with a pin 13n. As a result, the triangular frame 13 comes to a position where the placing work can be performed.

It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims rather than the description of the above-described embodiments, and is intended to include all modifications within the scope and meaning equivalent to the scope of claims.

Reference Signs List 1 : Base 2 : Swivel bearing 3 : Swivel base 4 : Bearing 5 : Boom 5a : Parent boom 5b : Child boom 10 : First winch 11 : Second winch 12 : Pulley 13 : Triangular frame (support frame)
13a: First supporting member 13b: Second supporting member 13c: Reinforcing rail 13d: Rail mounting member 13e: Horizontal rail 51: Triangular frame 51a: Mounting portion G: Ground

Claims (5)

a swivel;
a parent boom having a base end flexibly attached to the swivel base;
a child boom attached to the tip side of the parent boom so as to be able to rise and fall with respect to the parent boom;
a first wire rope pulled out from a first winch and coupled with the parent boom;
a second wire rope pulled out from a second winch and connected to the child boom;
a support frame provided on the swivel base and having a pulley attached to the tip thereof, on which the first wire rope and the second wire rope are stretched;
a concrete supply pipe supported by the parent boom and the child boom;
with
A distributor in which the raising and lowering motions of the parent boom and the child boom are controlled by the feeding and winding motions of the wire ropes of the first winch and the second winch,
The support frame includes a first support member attached to the swivel base so as to be swingable in a direction connecting the base end and the tip end of the parent boom, and swingable relative to the first support member. and a second support member attached to the swivel base and detachably attached to the swivel base, wherein the first support member and the second support member are foldable toward the parent boom. Distributor. 2. The distributor according to claim 1, further comprising a reinforcing bar that is swingably attached to said first support member or said second support member and connects between said first support member and said second support member. . 2. The first support member and the second support member are folded toward the parent boom while the first wire rope and the second wire rope are stretched over the pulley. 2. Distributor according to 2 above. The first support member is swingably attached to a mounting portion provided on the swivel base, and the mounting portion is positioned above the parent boom when the parent boom is at the lower limit position. Distributor according to any one of claims 1 to 3. 5. The distributor according to any one of claims 1 to 4, wherein the main boom is provided with a lowering arm attached to the swivel base.

Images