JPH042173Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a main jib roller insertion amount detection mechanism included in a crosslinking device.

[Prior Art] A conventional crosslinking device will be described below with reference to the drawings. FIG. 8 shows a state in which the bridge body 1 is in the middle of being withdrawn and is supported by the main jib 3 of the construction vehicle 2. 9 is an enlarged side view showing the main jib 3 and the supporting part of the bridge body 1 in FIG. 8, FIG. 10 is a sectional view taken along the line X-X in FIG. 9 and seen in the direction of the arrow, FIG. 11 is a view seen in the X1-X1 direction of FIG. 10, FIGS. 12 to 15 are for explaining the operating state of a conventional bridge construction device, and FIG. Fig. 13 shows a state in which the bridge body 1 is lower than the construction vehicle 2 and the amount of insertion of the front roller row is small, and Fig. 14 shows a state in which the bridge body 1 is lowered forward and the front roller row is Figure 15 shows a state where the row insertion amount is large, Figure 15 shows a state where the front roller row insertion amount is small with the bridge body 1 rising forward, and Figures 16 to 18 all show the main jib and front roller row insertion. 16 is a diagram showing a case where the amount of insertion of the front roller is appropriate after raising the main jib, and FIG. 17 is a diagram showing a case where the amount of insertion of the front roller is insufficient after raising the main jib.
FIG. 18 is a diagram showing a case where the amount of insertion of the front roller after raising the main jib is excessive.

As is clear from the figure, the main jib 3 has a total of four sets of roller rows on its front, rear, left and right sides, while the bridge body 1 is formed with a roller guide groove 5 into which the roller rows 4 can be inserted.

In the erection device having such a configuration, when the bridge body 1 is withdrawn, the front roller row 4 is moved by the movement of the erection vehicle 2.
is inserted into the roller guide groove 5 of the bridge body 1, and when the appropriate insertion position is reached, the main jib 3 is raised upward and the bridge body 1 is supported by the front and rear roller rows 4.

Now, as shown in FIG. 12, as the main jib 3 is raised upward, the front roller row 4 pivots upwards about the fulcrum of the main jib 3, and the bridge body 1 pivots upwards about the opposite shore ground contact point. As the bridge body 1 and main jib 3 rise, the front roller row 4 is further inserted into the bridge body 1, and when the rear roller row 4 is supported, that is, ₁ < ₀ , the roller row 4 is inserted into the roller guide groove 5. to stop.

Furthermore, the positional relationship between the bridge body 1 and the construction vehicle 2 is 13th.
If there is a difference as shown in FIG. 15, the initial insertion amount of the front roller row 4 must be changed by ₂ , ₃ , or _4, respectively.

Conventionally, the construction vehicle 2 was moved forward or backward according to the visual distance of the operator and guide, and it was not until the main jib 3 was raised that the initial insertion amount was inappropriate as shown in Figures 17 and 18. If it turns out that something is wrong, there is a risk of damage to various parts or the need to redo the operation.

[Problems to be solved by the invention] When the front roller row 4 of the main jib 3 is inserted into the guide groove 5 of the bridge body 1 when the bridge body is withdrawn as described above, (1) The construction vehicle 2 and the bridge body When the mutual position of 1 changes,
The required insertion amount of the roller row 4 changes.

(2) It is not known whether the initial insertion amount is optimal until the main jib 3 is raised and the bridge body 1 can be supported by both the front roller row 4 and the rear roller row 4.

(3) Not only an operator but also a guide is required.

Therefore, with this invention, even if the relative position between the construction vehicle and the bridge body changes when the bridge body is removed, the operator can easily know whether the amount of insertion of the front roller row is appropriate, and the bridge body can be removed safely and easily. It is an object of the present invention to provide a mechanism for quickly and reliably detecting the amount of insertion of a main jib roller in a crosslinking device.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes a roller provided on a main jib for erection and removal of a bridge body mounted on an erection vehicle capable of traveling on land, and a roller is provided on the main jib for erection and removal of a bridge body, In a crosslinking device having a roller guide groove for guiding a roller, a swing angle detector detects a swing angle between the bridge body and the main jib, and a bridge body position detector detects a relative position between the roller and the bridge body. Then, the optimum amount of roller insertion into the roller guide groove at the time of erection and removal of the bridge body with respect to the swing angle is memorized in advance, and the detection values of the bridge body position detector and the swing angle detector are inputted. Find the amount of roller insertion, compare this with the optimum amount of roller insertion,
It is equipped with an arithmetic unit that calculates the error between the two, and a display that displays the calculation results of this arithmetic unit.

[Function] By configuring as described above, the operator can know the optimum position for initial roller insertion from the display, and therefore, the bridge body can be reliably and quickly withdrawn without the need for guides.

[Example] The present invention will be described below with reference to the drawings. FIG. 1 is a partial sectional view of the main jib 3 of one embodiment, in which a swing angle detector (rock arm angle detector) 9 is provided for the main jib 3 of the swing arm 6 of the front roller row 4, and the roller A non-contact type bridge detector 8 is provided in the row 4, and the cable 14 of this bridge detector 8 is wound around a reel 15. This reel 15 prevents damage to the cable 14 even if the swinging arm 6 swings.

FIG. 2 is a diagram showing a state in which a plurality of objects to be detected 11, for example, magnetic materials, are provided at equal intervals in the roller guide groove 5 of the bridge body 1 of FIG. 1, and a bridge body position detector 8 is provided on the roller 4. , FIG. 3 is a diagram showing the relationship between the bridge body 1 and the detected object 11. As is clear from this figure, the bridge body position detector 8 and the detected object 11 are provided on the left and right, and the bridge body 1 is located on the left and right. Even if there is a deviation in either direction, it can be detected correctly.

Fig. 4 shows a case where the swing arm angle θ of the swing arm 6 of the bridge body 1 and the main jib 3 is large (corresponding to Figs. 13 and 15). The insertion amount of roller row 4 is small, and the front roller row 4 is removed by raising the main jib 3.
The sliding amount _S2 increases.

FIG. 5 shows a case where the swing angle θ' of the swing arm 6 of the bridge body 1 and the main jib 3 is small (corresponding to FIG. 14). 4 has a large insertion amount, and the sliding amount of the front roller row 4 when the main jib 3 is raised is large.
S ₂ ′ decreases. The relationship between this swing angle θ and the roller insertion amount is shown in FIG. As shown in the figure, when the swinging arm angle θ changes, the insertion amount of the roller row 4 also changes, and this process is performed by the position error calculator 12.

This means that the initial insertion amount of the roller row 4 is uniquely determined by the value of the swing angle θ. You will know whether to move forward or backward.

For this reason, the present invention provides the bridge body position detector 8 and the swing angle detector 9 as described above, and the sixth
As shown in the figure, the detection values of both the detectors 8 and 9 are
The input signal is input to the position error calculator 12, where the signal is processed to calculate whether the insertion amount of the roller row 4 is appropriate and the amount of correction, etc., and the calculation result of the position error calculator 12 is displayed on the display 13. It is set to be displayed. The bridge body position detector 8 can detect the position of the bridge body 1 by counting the number of detected objects 11.

With this configuration, the optimal position where both the front roller row 4 and the rear roller row 4 support the bridge body 1 is finally known, so the sixth
In the position error calculator 12 shown in the figure, the initial insertion amount is calculated backward from the insertion amount of the roller row 4 at that time using the swing arm angle θ between the bridge body 1 and the swing arm 6 as a parameter, and the operator On the other hand, it is displayed whether the front and rear positions of the construction vehicle 2 are the optimal positions.

For this reason, the operator can know from the display 13 the optimum position for initially inserting the front roller row 4, and therefore can reliably and quickly withdraw the bridge body 1 without the need for guides.

Note that in FIG. 7, the main jib raising area is generated from the amount of allowance given in advance to the support of the bridge body 1 by the rear roller row 4.

[Effects of the invention] According to the invention described above, a roller is disposed on the main jib for erection and removal of a bridge body mounted on an erection vehicle capable of traveling on land, and a roller guide for guiding the roller to the bridge body is provided. In an erection device having a groove, a swing angle detector detects a swing angle of the bridge body and the main jib, a bridge body position detector detects a relative position between the rollers and the bridge body, and a swing angle detector that detects a swing angle of the bridge body and the main jib; The optimum amount of roller insertion into the roller guide groove at the time of erection and removal of the bridge body is memorized, and the detected values of the bridge body position detector and the swing angle detector are inputted, and the roller insertion amount at that time is determined. It is equipped with a calculator that compares this with the optimum roller insertion amount and calculates the error between the two, and a display that displays the calculation results of this calculator, so that the operator can determine the initial optimum roller insertion position. It is possible to provide a mechanism for detecting the amount of insertion of the main jib roller of the crosslinking device, which can be known from the display and can therefore reliably and quickly withdraw the bridge body without the need for guides.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of the main jib in an embodiment of the present invention, Fig. 2 is an enlarged view of the roller guide groove of the bridge body in Fig. 1, and Fig. 3 is the relationship between the bridge body and the detected object. FIG. 4 and FIG. 5 are diagrams for explaining the operation of an embodiment of the present invention, respectively.
FIG. 6 is a block diagram showing a control circuit of an embodiment of the present invention, FIG. 7 is a diagram showing the relationship between the rocking arm angle and the roller insertion amount in the embodiment of FIG. 1, and FIGS.
The figure is a diagram for explaining an example of a conventional crosslinking device.
Figures 10 and 11 are diagrams showing the relationship between the roller and the loker guide groove in Figure 8 and the relationship between the main jib and the roller, and Figures 12 to 18 are diagrams for explaining the problems of the conventional crosslinking device. It is a diagram. 1...Bridge body, 2...Erection vehicle, 3...Main jib, 4...Roller row, 5...Roller guide groove, 6
... Rocking arm, 8 ... Bridge body position detector, 9 ... Rocking angle detector, 11 ... Object to be detected.

Claims (1)

[Claim for Utility Model Registration] A bridge construction device in which a roller is disposed on a main jib for erection and removal of a bridge body mounted on an erection vehicle capable of traveling on land, and the bridge body has a roller guide groove for guiding the roller. , a swing angle detector that detects the swing angle of the bridge body and the main jib; a bridge position detector that detects the relative position of the rollers and the bridge body; The optimum amount of roller insertion into the roller guide groove at that time is memorized, the detection values of the bridge body position detector and the swing angle detector are input, the roller insertion amount at that time is determined, and this and the roller optimum amount are input. A crosslinking equipment main jib roller insertion amount detection mechanism, comprising: a calculation unit that compares the insertion amount and determines the error between the two; and a display that displays the calculation result of the calculation unit.