JP2579829B2 - Casing driver concrete mixer truck climbing platform - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a casing driver for press-fitting and pulling out large-diameter steel pipe piles or steel pipes used for cast-in-place pile construction which is a foundation work for construction and civil engineering. It relates to a climbing platform that guides a concrete mixer truck after excavating a hard hole at the site.

(Prior Art) FIG. 3 shows that a climbing platform 4 is installed adjacent to a casing driver 1, a concrete mixer truck 5 rides on the climbing platform 4, and a ready-mixed concrete shooter 7 of the concrete mixer truck 5 enters the steel pipe 2. It is a side view which shows the working state which is putting ready-mixed concrete through the tremy tube 3. First, an outline of the operation by the casing driver 1 will be described. An elevating platform 8 which is elevated by a thrust cylinder (not shown) is provided on a main body 1a of the casing driver 1,
The steel pipe 2 is inserted into a steel pipe holding device 9 provided on the lift 8, the steel pipe 2 is caught by a tightening band 10, and the steel pipe 2 is rotated or rocked together with the steel pipe holding device 9 by a hydraulic device. It is pushed into the ground by the thrust cylinder provided in 1a. In addition, the earth and sand in the steel pipe 2 is excavated and discharged by a hammer grab bucket or the like as a middle excavator. And the above-mentioned work is repeated, while adding the steel pipe 2 of a predetermined pitch (for example, 1 m pitch),
After the steel pipe 2 has been built to a predetermined depth, a reinforced basket is inserted into a hollow place, that is, a digging hole, and a tremy pipe 3 for inserting medium concrete is inserted into the center of the steel cage.

When putting ready-mixed concrete into an excavation hole, since the casing driver 1 has a high overall height, an uphill platform 4 for guiding a concrete mixer truck 5 is used. The climbing platform 4 has a triangular profile on the side surface, has an anti-slip square member 4b on the upper surface, and has a stopper 4a for preventing and positioning the concrete mixer truck 5 from going too far to the casing driver 1 side. Then, adjacent to the casing driver 1,
If necessary, the concrete mixer truck 5 is guided by using the climbing platform 4 as a guideway, and the tip of the shooter 7 of the concrete mixer truck 5 is positioned at the upper end of the tremy tube 3 to mix the ready-mixed concrete. throw into.

Further, Japanese Utility Model Application Laid-Open No. 58-151257 discloses that as a movable slope deck, a plurality of slope deck pieces laid at an entrance of a vehicle, etc. A spacer which is appropriately inserted in accordance with the height of the structure below, and which forms the plurality of slope deck pieces as a constant continuous slope, is provided with a number of spacers and a stack corresponding to the height of the entrance. Select the number, place the slope deck pieces with different heights between adjacent ones on each of these spacers, and form a certain slope with the slope deck pieces placed directly on the ground. Have been.

(Problem to be Solved by the Invention) In the case of the climbing platform shown in FIG. 3, when the inclination angle of the climbing platform 4 is set to be large in the above-mentioned ready-mixed concrete work, the ground at the work site is muddy. To
The tire 5a of the concrete mixer truck 5 slips on the climbing platform 4, and depending on the skill of the driver of the concrete mixer truck 5, it may not be possible to climb the slope. When the tire 5a slips, the operator has taken measures such as taking measures to prevent the tire 5a from slipping. Therefore, in order to avoid such trouble and to prevent the concrete mixer truck from slipping even in a muddy ground condition, the inclination angle of the uphill platform 4 is conventionally made as small as possible, and at most about 11 degrees. Regardless of the skill of the person, it is possible to climb the slope.

On the other hand, when putting ready-mixed concrete, there is a demand to make the casing driver 1 side of the uphill platform 4 as high as possible. That is, generally, the lower end of the tremy tube 3 is always placed in the ready-mixed concrete in order to cast the ready-mixed concrete from the bottom of the excavation hole. Since it is necessary to feed the tube 3 while occasionally shaking it up and down, it is necessary to have a margin between the upper end of the tremy tube 3 and the tip of the shooter 7 for shaking the tube up and down. , The position of the shooter 7 needs to be high. Further, it is necessary to raise the steel pipe 2 slightly during the charging of the ready-mixed concrete so that the steel pipe 2 does not have a large frictional force with the ground or the ready-mixed concrete. You need to have. further,
The length per steel pipe is set at 1m pitch as described above. However, if the relationship between the set depth of the excavation hole and the length of the steel pipe 2 on hand does not match well, the two points in Fig. 3 As shown by the chain line a, the steel pipe 2 may protrude from the upper end of the casing driver 1. Ideally, ready-mixed concrete is cast to satisfy such various conditions. For this purpose, the climbing platform 4 may be raised so that the shooter 7 of the concrete mixer truck 5 is positioned higher than the upper end of the casing driver 1. However, in the conventional climbing platform 4, as described above, in order to prevent the tire 5a of the concrete mixer truck 5 from slipping, the inclination of the climbing platform 4 cannot be increased, and in order to increase the inclination at a small angle, There was a disadvantage that the length of the climbing platform 4 had to be increased.

Further, the slope deck disclosed in Japanese Utility Model Publication No. 58-151257, spacers having a fixed height are continuously provided on the ground, the number of stacked spacers is increased for each of the plurality of spacers, and the spacers are arranged stepwise. Since the slope deck pieces each having a certain slope are respectively placed thereon, so that a certain slope is formed on the upper surface, even if a plurality of spacers and slope deck pieces are combined. The inclination angle of the top surface does not change, and the height of the deck cannot be increased unless the length of the deck is increased, so in order to increase the height of the deck, it is necessary to increase the length of the deck However, there is a problem that it is difficult to apply in a narrow construction site.

The present invention has been made in view of such a problem, and an object of the present invention is to be able to cast ready-mixed concrete even at a ground condition of a work site where tires of a concrete mixer truck are slippery. If the ground at the work site is good, the concrete of the casing driver can be applied to the narrow construction site without increasing the length of the ascending platform without increasing the efficiency of fresh concrete. To provide a mixer truck climbing platform.

(Means for Solving the Problems) In order to achieve this object, the present invention relates to a concrete mixer truck which inserts ready-mixed concrete into a steel pipe press-fitted by a casing driver. None, a main climbing platform having a triangular side shape, and an auxiliary detachably mounted on the main climbing platform via a locking means, with the upper surface forming a non-slip structure and having a triangular profile. The climbing platform is constituted by the climbing platform.

In the present invention, the preferred structure of the auxiliary uphill platform is a structure in which the auxiliary uphill platform receives only rear wheels of ready-mixed concrete.

(Operation) Since the present invention has the above-mentioned structure, it is possible to use the auxiliary climbing platform over the main climbing platform, or to use the main climbing platform only by removing the supplementary climbing platform from the main climbing platform. it can. When only the main climbing platform is used, the inclination angle of the climbing platform becomes small. When the auxiliary climbing platform is used on the main climbing platform, the inclination angle becomes large, and the position of the shooter of the concrete mixer truck is increased. Can be set higher.

(Embodiment) FIG. 1 is a side view showing an embodiment of an uphill pedestal according to the present invention, and FIG. 2 is a perspective view showing details of FIG. 1 and 2, the same reference numerals as those in FIG. 3 indicate the same components. Reference numeral 6 denotes an auxiliary uphill table added according to the present invention. As shown in the figure, the auxiliary uphill table 6 is detachably mounted on the uphill table 4 having a small inclination angle (hereinafter referred to as a main uphill table). Things. The main climbing platform 4 may have the same structure as the conventional climbing platform 4 shown in FIG. 3, and a non-slip structure is realized by providing a non-slip square member 4b on the upper surface as in the related art.

On the upper surface of the auxiliary climbing platform 6, like the main climbing platform 4,
Anti-slip square lumber for tire 5a of concrete mixer truck 5
6a is fixed at equal intervals to realize a non-slip structure,
On the lower surface of the auxiliary climbing platform 6, there is an auxiliary climbing platform 6 on the main climbing platform 6.
As a means for locking the hills, a square bar 6b fitted between the square bars 4b on the upper surface of the main ascending platform 4 is fixed. Further, a dropper 6c for stopping and positioning the concrete mixer truck 5 from going too far toward the casing driver 1 is fixed to the end of the auxiliary climbing platform 6. In the present embodiment, the auxiliary climbing platform 6 has a short length such that only the rear wheel of the concrete mixer truck 5 is mounted thereon, but may have a structure in which the front wheel is also mounted.

Next, the use of this uphill platform will be described. If the excavated ground contains moisture, and the viscosity is high, and the tires 5a slip even though the anti-slip squares 4b are provided,
As shown in FIG. 3, the concrete mixer truck 5 is guided using only the main slope 4 with a gentle inclination. However, in this state, since the gap between the tip of the ready-mixed concrete shooter 7 and the tremy tube 3 is small, if the excavation depth and the installation length of the steel tube 2 indicate that the steel tube 2 is
If the vehicle stops at a high level as indicated by the dashed line a, the shooter 7 of the concrete mixer truck 5 moves to
Since the slope becomes loose and the ready-mixed concrete does not flow well, efficiency decreases.

On the other hand, if there is no slippage of the tire 5a and the concrete mixer truck 5 can go up smoothly, the auxiliary uphill platform 6 is placed on the uphill platform 4 as shown in FIG. At this time, the thicker end of the auxiliary uphill table 6 is brought into contact with the stopper 4a at the end of the main uphill table 4 on the side of the casing driver 1, and the square bar 6b provided on the lower surface of the auxiliary uphill table 6
Is inserted between the adjacent timbers 4b, 4b on the upper surface of the main climbing platform 4, the auxiliary climbing platform 6 does not slide down. In this state, the concrete mixer truck 5 is guided, or during this climbing, in this embodiment, the auxiliary climbing platform 6 has a short structure in which only the rear wheel of the concrete mixer truck 5 is mounted. Before reaching the auxiliary climbing platform 6, the main climbing platform 4 can be made to move forward at a gentle inclination angle and then run backward to ride on the auxiliary climbing platform 6, so that the inclination is increased by the auxiliary climbing platform 6. In addition, the backward movement of the concrete mixer truck becomes easy.

In this way, if the auxiliary climbing platform 6 is superimposed on the main climbing platform 4, the inclination becomes larger than the state of the main climbing platform 4 alone, and the position of the shooter 7 of the concrete mixer truck 5 can be increased. Even if the steel pipe 2 is stopped at a high level, the inclination of the shooter 7 can be increased, and the ready-mixed concrete can flow vigorously and the ready-mixed concrete can be efficiently placed. In addition, since the height of the shooter 7 can be increased, the tremee pipe 3 can be moved up and down and the lifting operation can be performed with a sufficient margin during the concrete placing operation described above.

(Effect of the Invention) According to claim 1, when the ground condition of the work site is such that the tire of the concrete mixer truck slips, the operator of the concrete mixer truck uses only the main slope having a gentle slope. Even if the skill of the work is low, it is possible to cast ready-mixed concrete.

Also, at work sites where the tires of concrete mixer trucks do not slip, the slope can be increased by using the auxiliary climbing platform on the main climbing platform. Even if there was
The position of the shooter of the ready-mixed concrete can be raised, and as a result, the inclination angle of the shooter can be increased, and the ready-mixed concrete can be poured into the tremy tube vigorously, so that the efficiency of placing the ready-mixed concrete can be improved. . Also, there is no need to lengthen the slope
Work can be performed even in narrow construction sites. In addition, the height can be increased without changing the length of the climbing platform,
Since the upper surface of the main climbing stand and the auxiliary climbing stand have a non-slip function, a wide selection range of the inclination angle can be secured,
From these, the height can be easily changed in a narrow construction site.

According to the second aspect, the length of the auxiliary climbing hill is shortened so that only the rear wheel of the concrete mixer truck is mounted. Therefore, the auxiliary climbing hill can be made compact and the inclination can be increased. In addition, when climbing a slope, before the concrete mixer truck reaches the auxiliary climbing platform, the main climbing platform can be gently tilted at a gentle inclination angle and then moved backward to be loaded on the auxiliary climbing platform. , The backward movement of the concrete mixer truck becomes easy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing an embodiment of a climbing stand according to the present invention in a working state where a concrete mixer truck is mounted, and FIG.
FIG. 3 is a perspective view showing details of the drawing, and FIG. 3 is a side view showing a working state using a conventional climbing platform. 1: casing driver, 2: steel pipe, 3: tremy pipe, 4: main climbing platform, 4a: stopper, 4b: anti-slip square, 5: concrete mixer truck, 6: auxiliary slope, 6a: anti-slip square, 6b:
Square material for locking, 6c: stopper, 7: shooter, 8: lifting platform, 9:
Steel pipe holding device, 10: tightening band

Claims (2)

(57) [Claims] 1. A climbing platform for a concrete mixer truck, in which ready-mixed concrete is poured into a steel pipe press-fitted by a casing driver, a main climbing platform having a non-slip upper surface and a triangular side profile; A concrete mixer truck as a casing driver, comprising an auxiliary climbing platform which has a non-slip structure, has a triangular side shape, and is removably mounted on the main climbing platform via locking means. Climbing platform. 2. The concrete mixer vehicle climbing platform of a casing driver according to claim 1, wherein said auxiliary climbing platform has a structure for receiving only a rear wheel of ready-mixed concrete.