JP2012171781A - Harness wiring structure for counterweight weight detection of boom type working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such the problem that when total weight of counterweights is detected by connecting a harness to a final assembly division weight assembled to the rear part of a turning base, there is a case that it is not easy to connect the harness to the final assembly division weight in some assembly configuration of the respective counterweights.SOLUTION: There is provided a harness wiring structure such that an upper division weight and a side division weight are assembled to the rear part of the turning base and the side division weight is the final assembly division weight. At a point of time when the upper division weight is assembled, the connector of a source harness and the connector of a first division harness are connected to the first connection port and the second connection opening of the upper division weight, the connector of a second division harness is connected to the connection port of the side division weight before the side division weight is assembled, and the connectors of the first division harness and second division harness can be connected to each other after the side division weight as the final assembly division weight is assembled.

Description

  The present invention is for detecting the weight of a counterweight constructed by assembling a predetermined number of divided weights at the rear part of a swivel base of a boom type work vehicle, and in particular, the final set assembled at the rear part of the swivel base. Counterweight weight detection that enables the total weight of the current counterweight to be detected by calculation by connecting a harness to the attached divided weight and determining the number of the last assembled divided weight. The present invention relates to a harness wiring structure.

  In boom type work vehicles (mobile cranes, aerial work vehicles, hydraulic excavators, etc.), a counterweight may be attached to the rear of the swivel as a balancer for the load applied to the boom. A predetermined number of divided weights corresponding to the magnitude of the load applied to the rear of the swivel base are assembled.

  Note that the total weight of the counterweight is basic data when performing so-called AML control (turnover prevention control), and the total weight of the current counterweight assembled at the rear of the swivel base is accurately grasped. There is a need.

  And, as a conventional general counterweight weight detection means, there are known ones in which the weight weight is directly measured using a load cell, and the stacked divided weights are respectively detected by a limit switch. ing.

  However, when the weight of the counter weight is directly measured by the load cell, there is a problem that it is difficult to accurately detect the weight because the influence of the frictional force between the weight and the support device on the swivel base is large. On the other hand, in the case of detecting each divided weight with a limit switch, there is a problem that stable detection may not be performed due to vibration during work.

  1 to 4 show a counterweight device and a weight detection device for the counterweight in a large boom type work vehicle (movable crane) adopted by the present applicant.

  The mobile crane shown in FIG. 1 has a swivel 2 mounted on a frame 11 of a vehicle 1 via a swivel bearing 12 so that the swivel 2 can be swung freely, and an extendable boom 13 is mounted on the swivel 2 so that it can be raised and lowered. Yes. A counterweight device is detachably mounted on the rear part 21 of the swivel base 2 (hereinafter simply referred to as the rear part of the swivel base).

  In the known counterweight device shown in FIGS. 1 to 4, a maximum of 11 divided weights 31 to 41 can be sequentially assembled to the rear part 21 of the swivel base in the order of (A) to (F) of FIG. 2. ing.

  That is, the counterweight device is assembled by first assembling the first divided weight 31 on the rear surface of the rear part 21 of the swivel base as shown in FIG. 2 (A), and then as shown in FIG. 2 (B). The second divided weight 32 and the third divided weight 33 are assembled to the rear part of the one divided weight 31, and then straddle over the upper portions of the first divided weight 31 and the third divided weight 33 as shown in FIG. Accordingly, the fourth divided weight 34 and the fifth divided weight 35 are sequentially assembled, and then the lower half of the left and right side portions of the first divided weight 31 to the third divided weight 33 as shown in FIG. Are assembled with the sixth divided weight 36 and the seventh divided weight 37, respectively, and then, as shown in FIG. 2 (E), respectively, on the upper half of the left and right side portions of the first divided weight 31 to the third divided weight 33. Eighth division weight 38 and ninth division weight 39 Assembling and finally assembling the tenth divided weight 40 and the eleventh divided weight 41 across the upper portions of the fifth divided weight 35, the eighth divided weight 38 and the ninth divided weight 39, a total of 11 pieces. Thus, the counterweight 3 composed of the divided weights can be completed.

  The first divided weight 31 is detachably mounted by a holding device 22 having a telescopic cylinder on the rear surface of the rear part 21 of the swivel base, while the second divided weight 32 to the eleventh divided weight 41 are installed in advance. The divided weights are sequentially assembled by pin connection. Note that the holding device 22 for mounting the first divided weight 31 is not so much related to the contents of the present application, and a detailed description thereof will be omitted.

  In the above-described divided weight assembling method, the second divided weight 32 and the third divided weight 33 shown in FIG. 2B, the fourth divided weight 34 and the fifth divided weight 35 shown in FIG. D) a sixth divided weight 36 and a seventh divided weight 37 shown in FIG. 2E, an eighth divided weight 38 and a ninth divided weight 39 shown in FIG. 2E, and a tenth divided weight 40 and an eleventh weight shown in FIG. The divided weights 41 are simultaneously handled as a single unit.

  3 is an enlarged view taken along the line III-III in FIG. 1 and is a view of FIG. 2F viewed from the back side. Accordingly, the left and right sides of FIG. 2 (F) and FIG. 3 are displayed in reverse. In FIG. 3, the numbers in the square boxes indicate the assembly order of the divided weights 31 to 41 (the second divided weight 32 and the third divided weight 33 are hidden by the first divided weight 31 and appear. Because there is no square box number).

  Each of the divided weights (total 11) of the first divided weight 31 to the eleventh divided weight 41 is known in advance and has a predetermined weight that corresponds to the work content (load applied to the boom). The divided weights of the number are used by being assembled in any one of the states (A) to (F) in FIG. Note that the total weight of the counterweight in each state of FIGS. 2A to 2F in the product implemented by the applicant is (A) 26 t (tons), (B) 57 t, (C) 94 t, ( D) is 127 t, (E) is 164 t, and (F) is 195 t. Of course, these weights are not particularly limited.

  In each assembled state shown in FIGS. 2A to 2F, six divided weights (first divided weight 31, third divided weight 33, fifth divided weight 35, which are final assembled divided weights, respectively) The seventh divided weight 37, the ninth divided weight 39, and the eleventh divided weight 41) are provided with connector connecting portions 42 to 47 (see FIGS. 3 and 4) at positions close to the upper part of the surface facing the front side of the swivel base. Provided. Each of the connector connecting portions 42 to 37 includes a connector 5a (see FIG. 4) at the end of the original harness 5 extended from the original connector connecting portion 51 (see FIG. 3) provided on the upper surface 21a of the swivel base 21. ) Are selectively connected. Note that the second divided weight 32, the fourth divided weight 34, the sixth divided weight 36, the eighth divided weight 38, and the tenth divided weight 40 are treated as a single (simultaneous) with the immediately following divided weights. No connector connection is provided in the divided weights (5, 32, 34, 36, 38, 40).

  As shown in FIG. 4, each of the connector connection portions 42 to 47 on the divided weight side has a function of identifying the divided weight in which the divided weight provided with the connector connection portions is assembled. ing. That is, when the final assembled divided weight is, for example, the first divided weight 31 shown in FIG. 2A, the connector 5a of the original harness 5 is connected to the connector connecting portion 42 of the first divided weight 31, When the first and second terminals of both connectors 5a and 42 are electrically connected, the determination device 8 of the controller 7 determines that the connection target is the first divided weight 31, and the final set For example, when the attached divided weight is the eleventh divided weight 41 shown in FIG. 2 (F), the connector 5a of the original harness 5 is connected to the connector connecting portion 47 of the eleventh divided weight 41. 47 and the seventh terminal are electrically connected to each other, and the determination device 8 of the controller 7 determines that the connection target is the eleventh divided weight 41.

  When the discriminating device 8 discriminates what number the final assembly division weight is, a discriminating signal from the discriminating device 8 is sent to the arithmetic device 9 (see FIG. 4) of the controller 7, and the computation is performed. The apparatus 9 calculates the total weight of the counterweight 3 assembled in the rear part 21 of the swivel base by adding the individual weights of the respective divided weights up to the order. Then, the total weight of the counterweight 3 calculated by the arithmetic unit 9 is displayed on a display device (display) 10 so that it can be confirmed whether or not the total weight of the counterweight is desired.

  As shown in FIG. 4, the applicant of the present application is disclosed in Japanese Patent Application Laid-Open No. 2008-1444 (Patent Document) on the assumption that the final assembly division weight can be determined by electrical connection. 1) has already been proposed.

  By the way, in the counterweight weight detection device described above (FIGS. 3 and 4), it is possible to determine how many divided weights are assembled to the rear part 21 of the swivel base by electrical connection to the final assembled divided weights. There is an advantage that the total weight of the counter weight actually assembled can be accurately calculated by adding the individual weights of each divided weight up to the determined final assembled divided weight, In the known counterweight weight detection apparatus, the connection is performed as follows in the assembled state of the divided weights shown in FIGS.

  That is, the assembled state of the divided weights shown in FIG. 2 (D) and FIG. 5 is that the seven divided weights from the first divided weight 31 to the seventh divided weight 37 are assembled to the rear part 21 of the swivel base. However, in this assembled state, the seventh divided weight 37 on the lower side of the left side in FIG. 5 becomes the final assembled divided weight. In the assembled state of FIG. 5, the connector 5 a of the original harness 5 is connected to the connector connecting portion 45 of the seventh divided weight 37 from the upper surface 21 a side of the swivel rear portion 21. 45 is far away from the upper surface 21a of the swivel base 21 (the connector connection part 45 of the seventh split weight 37 cannot be reached from above the swivel back 21), and the side surface of the seventh split weight 37 ( It is provided in a recessed state at a position near the upper end of the surface facing the front side of the swivel.

  And in order to connect the reference | standard side connector connection part 51 of the upper surface 21a of the turntable rear part 21 and the connector connection part 45 of the 7th division | segmentation weight 37 with the former harness 5, it carries out as follows.

  First, as shown in FIG. 5, after the worker M1 rising on the upper surface 21a of the turntable rear part 21 connects the base end part (connector) of the original harness 5 to the connector connection part 51 on the turntable rear part 21 side. The connector 5a on the distal end side of the original harness 5 is led to the upper surface 37a side of the seventh divided weight 37. In addition, there are many operations on the rear part 21 of the swivel base when assembling the divided weights (such as a pin coupling operation and a hanging rope removing operation for the divided weights to be assembled). The worker M1 who is raised on the rear part 21 of the swivel can carry out.

  When one worker M1 who is raised on the rear part 21 of the turntable also performs the connecting work of the original harness 5, the worker M1 descends from the rear part 21 of the turntable and rises on the seventh divided weight 37. The connector 5a of the original harness 5 (preliminarily guided onto the seventh divided weight 37) is connected from the seventh divided weight 37 to the connector connecting portion 45 on the seventh divided weight 37 side. Connect to. In addition, when another person (M1 and M2) performs the work on the rear part 21 of the turntable and the work on the seventh divided weight 37, two workers are required.

JP 2008-1444 A

  However, when the connector 5a of the original harness 5 extended from the swivel base rear portion 21 side is directly connected to the connector connecting portion 45 of the seventh divided weight 37 as described above, there are the following problems.

  First, since the hand of the worker M1 (FIG. 5) raised on the rear part 21 of the swivel base cannot reach the connector connecting part 45 of the seventh divided weight 37, the harness connecting work is performed by one worker M1. 5, it is necessary that the worker M1 prepares the harness arrangement on the turntable rear part 21 and then gets down from the turntable rear part 21 and rises again onto the seventh divided weight 37 as shown in FIG. Therefore, the movement of the worker was troublesome. In particular, both the upper surface 21a of the swivel base 21 and the upper surface 37a of the seventh divided weight 37 have a considerable height (for example, about 2.5 to 3 m) from the ground. I needed it.

  Second, the connector connecting portion 45 on the seventh divided weight 37 side is provided in a recessed state at a position near the upper end of the weight side surface (the surface facing the front of the swivel base). In the standing posture, the connector connecting portion 45 cannot be seen. Then, in order to connect the connector 5a of the original harness 5 to the connector connecting portion 45, as shown in FIGS. 5 and 6, the worker M2 bends on the seventh divided weight 37 and leans out from the side edge. It is necessary to extend the hand downward with the right posture. Therefore, in order to connect the connector 5a of the former harness 5 on the swivel base to the connector connecting portion 45 of the seventh divided weight 37, it is performed in an unnatural posture at a high place (a posture that is bent and leaned out). Therefore, the connection work is difficult and dangerous.

  Therefore, in the present application, as the divided weights to be assembled to the rear part of the swivel base, the divided weights shown in FIG. 5 are assembled at a position corresponding to the rear surface of the rear part 21 of the swivel base, higher than the upper surface 21a of the rear part 21 of the swivel base. In an assembled state using the upper divided weight (fifth divided weight) 35 and the side divided weight (seventh divided weight) 37 disposed below the left side of the rear part of the swivel which is the final assembled divided weight, The connector connecting portion 45 of the final assembled divided weight (seventh divided weight 37) and the original connector connecting portion 51 (to which the original harness 5 is connected) on the rear side of the swivel base 21 are connected from above the side divided weight 37. The object is to enable easy and safe connection.

  In the present invention, a plurality of divided weights to be assembled to the rear part of the swivel base are assembled at a position corresponding to at least the rear surface of the rear part of the swivel base at a position higher than the upper surface of the rear part of the swivel base. The original harness that has left and right side divided weights assembled at a position lower than the upper surface of the rear part of the swivel base and the side divided weights are assembled in order from the upper divided weight, while extending from the swivel side. The boom type work that can detect the total weight of each divided weight assembled to the rear part of the swivel base by connecting the connector at the tip of the connector to the connector connecting part provided on the divided weight assembled last. The object is a harness wiring structure for detecting the weight of a counterweight in a car. The upper divided weight corresponds to the fifth divided weight in the known example of FIGS. 3 and 5, and the side divided weight corresponds to the seventh divided weight in FIG.

  In addition, the harness wiring structure for detecting the weight of the counterweight according to the present invention also uses the electrical connection to determine the last assembled weight of the predetermined number of divided weights assembled at the rear part of the swivel base. The total weight of all the divided weights assembled by the arithmetic unit can be calculated by recognizing what the final assembled divided weight is.

  And in the harness wiring structure of this invention, it has the following structure as a means for improving the problem of the counterweight weight detection apparatus of an above-mentioned well-known example (FIGS. 3-6).

  First, a connector connecting portion capable of connecting a connector at the end of the harness is provided on a surface facing the swivel front side of the upper divided weight and a surface facing the swivel front side of the side divided weight. .

  Secondly, a relay harness for connecting the connector connecting portion of the upper divided weight and the connector connecting portion of the side divided weight is used. This relay harness is divided into two lengths. It has a 1-divided harness and a second-divided harness.

  Third, the connector connection portion of the upper divided weight includes a first connection port for connecting a connector at the tip of the original harness and a second connection port for connecting a connector at one end of the first divided harness. Provided in electrical connection.

  Fourth, the connector connecting portion of the side divided weight which is the final assembled divided weight is provided with a connection port for connecting a connector at one end of the second divided harness.

  And in the harness wiring structure of the present invention, when the upper divided weight is assembled to the rear part of the swivel base, the connector of the original harness extended from the swivel base side is in the connector connection part of the upper split weight. The side part division which is connected to the first connection port while connecting the connector at one end of the first split harness to the second connection port in the connector connection part of the upper split weight and becomes the final assembly split weight Before the weight is assembled to the rear part of the swivel base, the connector at one end of the second divided harness is connected to the connection port at the connector connecting portion of the side divided weight, and the side divided weight is attached to the final group. After assembling all the divided weights as the attached divided weights to the rear part of the swivel base, the weights are raised on the side divided weights, and the first divided harness and the second divided weight are raised. Each Ness are adapted to connect the connectors at the other end.

  By the way, when assembling the upper divided weight to the rear part of the swivel base, an operator for assembling the upper divided weight is raised on the rear part of the swivel base, and the upper divided weight assembled to the rear part of the swivel base. Since the weight connector connection part is in a position where workers standing on the rear part of the swivel can face each other and easily reachable, connect the connector of the original harness and the connector of the first split harness that are extended from the swivel side, respectively. The operation of connecting to the connector connection portions (first connection port and second connection port) of the upper divided weight can be easily and stably performed.

  In addition, the connector at the one end of the second divided harness is connected to the connector connecting portion (connection port) of the side divided weight which becomes the final assembled divided weight, before the side divided weight is assembled. This connection operation can be performed at an appropriate time (for example, on the ground before lifting).

  On the other hand, when assembling the side divided weights that will be the final assembled divided weights, an operator for assembling the side divided weights (or for removing the hanging rope) goes up on the side divided weights. Therefore, to connect the connectors at each end of the first split harness and the second split harness that have been connected to the connector on one end first, the worker rising on the side split weight is in a stable posture. You can do it (while standing).

  Further, in the harness wiring structure of the present invention, since the connection port of the side divided weight is connected to the original harness on the swivel side via the connection port of the upper divided weight by the relay harness, the side divided weight in the final order is connected. However, when the upper divided weight is not attached, the recognition becomes impossible, and erroneous wiring can be prevented.

  The harness wiring structure for counterweight weight detection according to the present invention has the following effects.

  That is, in the harness wiring structure of the present invention, after the upper divided weight is assembled to the rear part of the swivel base, a predetermined number of divided weights are assembled with the side divided weight being the final assembled divided weight, and the upper divided weight is assembled. In order to connect the connector connecting portion of this side and the connector connecting portion of the side divided weight which is the final assembled divided weight with a relay harness, the relay harness is divided in advance, and one end (connector) of the first divided harness is While one end (connector) of the second split harness is connected to the connection port of the side split weight while it is connected to the second connection port of the upper split weight, one end (connector) of the second split harness in the state of the split harness Can be easily connected to each connection port. In addition, with the upper divided weight attached to the rear part of the swivel base, the tip (connector) of the original harness extended from the swivel base side is connected to the first connection port of the upper split weight. It can be done easily from the table.

  And in the state which assembled | attached the side part weight which becomes the last assembly | attachment division weight, it was made to connect with the other end (connector) of the 1st division harness connected to the upper division weight side, and the side part division weight side. In order to connect the other end (connector) of the second split harness, each connector of the split harness can move within the range of the harness free portion, so that an operator stands on the side split weight. It can be performed in a stable posture and in front of the operator.

  Therefore, in the harness wiring structure of the present invention, there is an effect that the work for connecting the harness can be easily performed and the safety is improved even in the connection work at a high place.

  Also, since the connection port of the side division weight is connected to the original harness on the swivel base side via the connection port of the upper division weight by the relay harness, the upper division is recognized to recognize the side division weight in the final order. In the state where no weight is attached, recognition is impossible, and therefore, there is an effect that a counterweight weight is not erroneously detected (detection error of the number of weights).

It is a side view of a boom type work vehicle equipped with a counterweight. It is explanatory drawing which shows the assembly | attachment order of the counterweight with which the boom type work vehicle of FIG. 1 is equipped. It is explanatory drawing of a well-known counterweight weight detection apparatus by the III-III arrow line view of FIG. It is explanatory drawing of the weight detection method in the counterweight weight detection apparatus of FIG. 3 (known). It is explanatory drawing of the problem of the counterweight weight detection apparatus of FIG. 3 (known). FIG. 6 is a view on arrow VI of FIG. FIG. 3 is an assembly state diagram (corresponding to a view taken along arrows III-III in FIG. 1) of the counterweight adopting the harness wiring structure for detecting the weight of the counterweight according to the embodiment of the present application. It is explanatory drawing of the counterweight weight detection apparatus which employ | adopted the harness wiring structure of FIG. FIG. 8 is an explanatory diagram of how to use the harness wiring structure of FIG. 7. FIG. 10 is a state change diagram from FIG. 9. It is a XI arrow line view of FIG. It is explanatory drawing of the harness connection state in FIG.

  Hereinafter, a harness wiring structure for counterweight weight detection according to an embodiment of the present invention will be described with reference to FIGS. 7 to 12 (in combination with FIGS. 1 and 2).

  The assembly diagram of the counterweight 3 shown in FIG. 7 is a view corresponding to the arrow III-III of the boom type work vehicle of FIG. 1, but the mobile crane shown in FIG. Adopted. In addition, the description of the mobile crane shown in FIG. 1 uses the one described in the above-mentioned “Background Art” section (the description of the mobile crane is omitted here because it is redundant description).

  The mobile crane of FIG. 1 is also detachably equipped with a counterweight device at the rear part 21 of the swivel, but in the embodiment of the present application as shown in FIGS. 2A to 2F as a counterweight device. A maximum of 11 divided weights 31 to 41 can be assembled sequentially. In addition, what was demonstrated in the above-mentioned "background art" is used also about the assembly | attachment order of each division | segmentation weight 31-41 shown to (A)-(F) of FIG.

  Also in this embodiment, the individual weights of the first divided weight 31 to the eleventh divided weight 41 (total of 11 pieces) are known in advance, and according to the work content (load applied to the boom). A predetermined number of divided weights that are necessary weights are assembled and used in any one of the states (A) to (F) in FIG.

  6 divided weights (first divided weight 31, third divided weight 33, fifth divided weight 35, respectively) as final assembled divided weights in each assembled state shown in FIGS. The seventh divided weight 37, the ninth divided weight 39, and the eleventh divided weight 41) are provided with connector connecting portions 42 to 47 as shown in FIG. Each of the connector connecting portions 42 to 47 is provided in a recessed state at a position near the upper part of the surface facing the front side of the swivel base. Note that the second divided weight 32, the fourth divided weight 34, the sixth divided weight 36, the eighth divided weight 38, and the tenth divided weight 40 are treated as a single (simultaneous) with the immediately following divided weights. No connector connection is provided in the divided weights (5, 32, 34, 36, 38, 40).

  In the counterweight device according to this embodiment, the six connector connecting portions 42, 43, 44, 46, and 47 excluding the connector connecting portion 45 of the seventh divided weight 37 are provided on the upper surface 21a of the swivel base rear portion 21. The connector 5a (see FIG. 8) at the end of the original harness 5 extended from the original-side connector connecting portion 51 (see FIG. 7) is selectively connected. A connector 62a of the second split harness 62 described later is connected to the connector connecting portion 45 of the seventh split weight 37.

  As shown in FIG. 8, each of the connector connection portions 42 to 47 on the divided weight side has a function of identifying the divided weight in which the divided weight provided with the connector connection portions is assembled. ing. That is, when the final assembled divided weight is, for example, the first divided weight 31 shown in FIG. 2A, the connector 5a (see FIG. 8) of the original harness 5 is connected to the connector connecting portion 42 of the first divided weight 31. However, at that time, the first and second terminals of the connectors 5a and 42 are electrically connected to each other, and the determination device 8 of the controller 7 determines that the connection target is the first divided weight 31. When the final assembled divided weight is, for example, the eleventh divided weight 41 shown in FIG. 2F, the connector 5a of the original harness 5 is connected to the connector connecting portion 47 (see FIG. 8) of the eleventh divided weight 41. At that time, the first and seventh terminals of the connectors 5a and 47 are electrically connected to each other, and the discrimination device 8 of the controller 7 sets the connection target to the eleventh divided weight 41. It is determined that that.

  When the discriminating device 8 discriminates what number the final assembly division weight is, a discriminating signal from the discriminating device 8 is sent to the arithmetic device 9 (see FIG. 8) of the controller 7, and the computation is performed. The apparatus 9 calculates the total weight of the counterweight 3 assembled in the rear part 21 of the swivel base by adding the individual weights of the respective divided weights up to the order. Then, the total weight of the counterweight 3 calculated by the arithmetic unit 9 is displayed on a display device (display) 10 so that it can be confirmed whether or not the total weight of the counterweight is desired.

  By the way, the harness wiring structure (details will be described later) employed in the embodiment of the present invention functions in a state in which a total of seven divided weights 31 to 34 are assembled as shown in FIGS. However, in the assembled state of the divided weights shown in FIGS. 2D and 9, the fifth divided weight 35 is higher than the upper surface 21 a of the swivel base rear part 21 at a position corresponding to the rear face of the swivel base rear part 21. The seventh divided weight 37 is assembled at a position below the upper surface 21a of the swivel base rear portion 21 below the left side of the fifth divided weight 35 in the state shown in FIG. In the present embodiment, the fifth divided weight 35 is the upper divided weight in the claims, and the seventh divided weight 37 is the side divided weight in the claims.

  9, the connector connecting portion 45 of the seventh divided weight 37 is far away from the upper surface 21a of the swivel base rear part 21 (from the top of the swivel base rear part 21 to the seventh divided weight 37). The connector connection portion 45 is provided in a recessed state at a position near the upper end of the side surface of the seventh divided weight 37 (the surface facing the front of the swivel base). Therefore, the divided weight assembled state of FIG. 9 has various problems described in the section “Problems to be solved by the invention”.

  Therefore, the harness wiring structure of the embodiment of the present application is for solving the above-described problem, and has the connector connection portions 44 and 45 in the fifth divided weight 35 and the seventh divided weight 37 as described above. In addition to the configuration described above, each configuration shown in FIGS.

  First, the relay harness 6 for connecting the connector connecting portion 44 of the fifth divided weight (upper divided weight) 35 and the connector connecting portion 45 of the seventh divided weight (side divided weight) 37 is used. The relay harness 6 has a first split harness 61 and a second split harness 62 whose length is divided into two. The first split harness 61 is stored in a harness storage portion 63 provided on the side surface of the fourth split weight 34 (the surface facing the front side of the swivel), and the second split harness 62 is the side surface of the seventh split weight 37. It is housed in a harness housing portion 64 provided on the surface facing the front of the swivel. As described above, when the divided harnesses 61 and 62 are stored in the harness storage portions 63 and 64, respectively, when the divided weights 34 and 37 are suspended by the crane, Does not interfere with the member (does not catch).

  The connector connection portion 44 of the fifth divided weight 35 includes a first connection port 44a for connecting a connector 5a (see FIG. 8) at the tip of the original harness 5 and a connector 61a at one end of the first divided harness 61. A second connection port 44b to be connected is provided in an electrically connected state. That is, as shown in FIG. 8, the first connection port 44a and the second connection port 44b are connected to the first terminal and the fifth terminal, respectively.

  Further, the connector connection portion 45 of the seventh divided weight 37 serving as the final assembled divided weight is provided with a connection port 45 a for connecting the connector 62 a at one end of the second divided harness 62.

  In the harness wiring structure of this embodiment, as shown in FIG. 2C, when the fifth divided weight 35 is assembled above the swivel rear part 21 (as shown in FIG. 9) 21), and the connector 5a (FIG. 8) of the original harness 5 that the worker M1 on the rear part 21 of the turntable extends from the upper surface 21a (the original connector connection part 51) of the rear part 21 of the turntable. Is connected to the first connection port 44a in the connector connection portion 44 of the fifth divided weight 35, while the connector at one end of the first divided harness 61 housed in the harness housing portion 63 on the side surface of the fourth divided weight 34. 61 a is connected to the second connection port 44 in the connector connection portion 44 of the fifth divided weight 35. Each connection work at this time can be performed in a posture in which the worker M1 on the rear part 21 of the turntable faces the connection position. Therefore, the connection work can be performed easily and safely. The connector 61b on the other end side of the first split harness 61 may be temporarily held (for example, clipped) at a position closer to the side portion on the side where the seventh split weight 37 is assembled as shown in FIG. .

  On the other hand, before assembling the seventh divided weight 37 as the final assembled divided weight, the connector 61a at one end of the second divided harness 62 is connected to the connection port 45a of the connector connecting portion 45 of the seventh divided weight 37. Keep it. Since the connection work in this case is also performed before the seventh divided weight 37 is assembled, it is simple and safe. The connector 62b on the other end side of the second divided harness 62 may be temporarily held (for example, clipped) at a position near the upper end of the seventh divided weight 37 as shown in FIG.

  Thereafter, all the divided weights (seven in total) having the seventh divided weight 37 as the final assembled divided weight are assembled to the rear part 21 of the swivel base. When the seventh divided weight 37 is assembled, as shown in FIG. There is an operator M2 for assembling (pin coupling) or removing the hanging rope on the seventh divided weight 37.

  Then, after assembling the seventh divided weight 37 which is the final assembled divided weight, as shown in FIG. 10, the worker M2 on the seventh divided weight 37 moves to the other end side of the second divided harness 62. While holding the connector 62b and pulling it upward (state of reference numerals 62 'and 62b'), the connector 61b on the other end side of the first split harness 61 is removed (state of reference numeral 61b '), and both connectors 61b'62b' are removed. Connect. In the connection work in this case, as shown in FIG. 11, the connectors 61b and 62b of both the split harnesses 61 and 62 can be moved within the range of the harness free portion, so that both the connectors 61b and 62b are connected to the seventh split weight 37. Since the connection can be made in a stable posture with the worker standing on the front and in front of the worker, the connection work in this case can be performed easily and safely.

  As described above, the harness wiring structure according to the embodiment of the present invention can easily perform all the operations for connecting the harness and can improve the safety even in the connection work at a high place.

  FIG. 12 is a connection diagram (circuit diagram) in which the connectors of the respective harnesses (the original harness 5, the first split harness 61, and the second split harness 62) in the split weight assembled state of FIGS. 9 to 11 are connected. In this case, the first terminals and the fifth terminals of the connectors 5a, 44a, 44b, 61a, 61b, 62b, 62a, and 45a are connected to each other, and the connector 5a of the original harness 5 is the fifth. The divided weight 35 is connected to the first connection port 44a. Therefore, in the state of FIG. 12, the discriminating device 8 recognizes that the final assembled divided weight is the seventh divided weight 37 by the current flowing through the first terminal and the fifth terminal, while the first terminal When the current flows through the fourth terminal, it is recognized that the fifth divided weight 35 is also assembled.

  In FIG. 12, square enclosures L1 to L6 are lamps. When current flows through terminals 2 to 7, lamps (L1 to L6) connected to the terminals are turned on. Yes. In the state of FIG. 12, the L3 lamp and the L4 lamp are lit, whereby it is possible to recognize that the seventh divided weight 37 is the final assembled divided weight, and the fifth divided weight 35 is also normal. You can recognize that it is assembled.

  It should be noted that a structure (or shape) in which the connector 5a of the original harness 5 cannot be connected to the connector connecting portion 45 (connecting port 45a) of the seventh divided weight 37 and the connector 62b of the second divided harness 62 is adopted. In this case, it is possible to prohibit the connector 5a of the original harness 5 from being directly connected to the connection port 45a of the seventh divided weight 37 without passing through the connector connection portion 44 (first connection port 44a) of the fifth divided weight 35. Wiring can be prevented.

  When the discriminating device 8 (FIGS. 8 and 12) recognizes how many division weights are assembled, the discriminating signal is sent to the arithmetic device 9, and up to the recognized number is obtained by the arithmetic device 9. By adding the individual weights of the respective divided weights, the total weight of the counterweight 3 assembled to the rear part 21 of the swivel base can be calculated. Further, the total weight of the counterweight 3 calculated by the arithmetic unit 9 is displayed on a display device (display) 10 so that it can be checked whether or not the total weight of the counterweight is desired. .

  1 is a vehicle, 2 is a swivel, 3 is a counterweight, 5 is a former harness, 5a is a connector, 6 is a relay harness, 7 is a controller, 8 is a discrimination device, 9 is an arithmetic unit, 10 is a display device, and 21 is a turn Rear part of the base, 31 to 41 are first divided weight to eleventh divided weight, 42 to 47 are connector connecting parts, 44a is a first connecting port, 44b is a second connecting port, 45a is a connecting port, and 51 is an original connector. A connection part, 61 is a first split harness, 61a and 61b are connectors, 62 is a second split harness, and 62a and 62b are connectors.

Claims (1)

A plurality of divided weights to be assembled to the rear part of the swivel base, the upper divided weight to be assembled at a position higher than the upper surface of the rear part of the swivel base at a position corresponding to the rear surface of the rear part of the swivel base, and a swivel base below the side part of the upper divided weight It has left and right side split weights that are assembled at a position lower than the upper surface of the rear part, and the side part split weights are assembled in order after the upper part split weights, while the original harness extended from the swivel base side is the final Counterweight in a boom-type work vehicle that can detect the total weight of each divided weight assembled at the rear of the swivel base by being electrically connected to the connector connection provided on the divided weight assembled to A harness wiring structure for detection,
Provided on the surface facing the swivel front side in the upper divided weight and the surface facing the swivel front side in the side divided weight, respectively, are provided with connector connecting portions that can connect the connectors at the end of the harness,
A relay harness for connecting the connector connection portion of the upper divided weight and the connector connection portion of the side divided weight, and using a first divided harness and a second divided harness, the length of which is divided into two,
The connector connection portion of the upper split weight is electrically connected to a first connection port that connects a connector at the tip of the original harness and a second connection port that connects a connector at one end of the first split harness. Provided in the state,
The connector connecting portion of the side split weight is provided with a connection port for connecting a connector at one end of the second split harness,
When the upper divided weight is assembled to the rear of the swivel base, the connector of the original harness extended from the swivel side is connected to the first connection port in the connector connection part of the upper split weight, Connect the connector at one end of the first split harness to the second connection port at the connector connection portion of the upper split weight,
Before the side divided weight which becomes the final assembled divided weight is assembled to the rear part of the swivel base, the connector at one end of the second divided harness is connected to the connection port at the connector connecting portion of the side divided weight. Leave
After assembling all the divided weights at the rear part of the swivel with the side divided weight as the final assembled divided weight, the other divided ends of the first divided harness and the second divided harness are raised on the side divided weight. So that each connector can be connected to each other,
A harness wiring structure for detecting the weight of a counterweight in a boom type work vehicle.

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