JP2018155039A - Piping connection structure and construction machine using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping connection structure in which it does not become difficult to identify due to deterioration, and that has high versatility and compatibility of piping components.SOLUTION: The piping connection structure is used in a construction machine (15) and has an erroneous connection prevention function for pipes to which joints (3a, 3b) connectable to each other are attached on their ends. The piping connection structure comprises: a pair of clamp joints (5a, 5b) attached and fixed to a location separated from one piping joint and a location separated from the other piping joint respectively; and a pair of identification plates (4a, 4b) having shapes in which end surfaces facing each other are abutted and fitted and in which the vicinity of end surfaces opposite to the end surfaces facing each other are attached and fixed to predetermined locations of the pair of clamp joints.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a pipe connection structure having an erroneous connection prevention function and a construction machine to which the pipe connection structure is applied.

  2. Description of the Related Art Conventionally, in a machine that operates using hydraulic pressure or pneumatic pressure as a motive power, a pump, a compressor, control valves, and various actuators, which are power sources, are connected by piping composed of pipes and hoses. These pipes are connected to each other by connecting pipes, hoses, or pipes and hoses using pipe joints (clamps) so that they can be separated in the middle of the pipe line due to machine layout and assembly reasons. Provided.

  By the way, in such a relay point of piping, when the same type of pipe joints are adjacent to each other, there is a possibility that they are erroneously connected in different combinations during assembly. If they are connected in different combinations, there is a possibility of causing an accident due to a malfunction of the machine, breakage of a hydraulic machine or a pneumatic machine, etc., and measures to prevent erroneous connection are required. In particular, various devices have been applied to the pipe connection structure provided in the watering machine of the construction machine.

  As a well-known technique related to measures for erroneous connection of piping, it is easy to check for incorrect assembly of hydraulic hoses after assembly and prevent accidents caused by misconnection of different types of hydraulic hoses. Hose misassembly prevention device "(see Patent Document 1).

JP 2010-106580 A

  In the technique described in Patent Document 1 described above, when a plurality of types of hydraulic hoses are connected and assembled to hose connection parts of various hydraulic devices for each type, identification tapes for identifying the types of hydraulic hoses are provided. A plurality of parts are attached near the connection end of the hydraulic hose.

  However, in the method of attaching the identification tape to each hydraulic hose, there is a problem that the identification tape becomes difficult if the identification tape is deteriorated such as dirt, fading, and printing thinning. In addition, in the type of joint that connects the plug and the socket, a method of providing an identification portion constituted by a groove and a protrusion is also known. In this case, since it is necessary to use joints having different shapes corresponding to the number of pipes, problems remain in terms of versatility and compatibility of pipe parts.

  The present invention has been made in view of such a situation, and its technical problem is that it is not difficult to identify due to deterioration, and a pipe connection structure having high versatility and compatibility of pipe parts, and construction using the pipe connection structure To provide a machine.

  In order to solve the above technical problem, one aspect of the present invention is a pipe connection structure having a function of preventing erroneous connection between pipes that are used in construction machines and joints that can be connected to each other are attached to ends. And a pair of clamp joints that are respectively attached and fixed to a place separated from the joint of one pipe and a place separated from the joint of the other pipe, and having a shape in which opposing end faces are abutted and fitted. In addition, a pair of identification plates that are attached and fixed to predetermined portions of the pair of clamp joints in the vicinity of the spaced apart end surfaces opposite to the opposing end surfaces are provided.

  According to the present invention, it is possible to provide a pipe connection structure that does not become difficult to identify due to deterioration and that is highly versatile and compatible with pipe parts. Other problems, configurations, and effects will become apparent from the following description of the embodiments.

It is a figure showing appearance composition of a demolition machine which is an example of a construction machine to which a pipe connection structure concerning an embodiment of the present invention is applied. FIG. 2 is an enlarged view of a part of a pipe provided in the dismantling machine shown in FIG. It is the figure which showed schematic structure of the pipe connection structure which concerns on embodiment of this invention in the state before an assembly | attachment, (a) is the figure shown partially broken from the upper surface direction, (b) is the left side surface direction. Sectional drawing, (c) is a diagram showing the internal structure exposed partially broken from the side direction. It is the figure which showed the modification of the identification plate used for the piping connection structure shown in FIG. 3 from the upper surface direction, (a) is a figure of the shape shown to Fig.3 (a), (b) is an example of the deformed shape. (C) is a diagram of another example of the deformed shape. It is the figure which showed the schematic structure of the piping connection structure shown in FIG. 3 in the state after assembly | attachment, (a) is the figure shown partially broken from the upper surface direction, (b) is made partially broken from the side direction The figure shown and (c) are the figures which fractured | ruptured partially from the side surface direction, and showed the internal structure.

  Hereinafter, embodiments of a pipe connection structure of the present invention and a construction machine to which the pipe connection structure is applied will be described in detail with reference to the drawings.

  FIG. 1 is a diagram illustrating an external configuration of a dismantling machine 15 that is an example of a construction machine to which a pipe connection structure according to an embodiment of the present invention is applied.

  Referring to FIG. 1, the dismantling machine 15 includes a crawler-type lower traveling body 11 having an upper turning body 12 including a cab, a control device, a display device, a controller, an engine, various pipes 14, a work machine 13, and the like. It is configured to be able to turn. The work machine 13 includes a boom, an arm, a fixed bucket, a movable bucket, a rotation base for rotatably supporting these buckets with respect to the arm, a bucket cylinder for driving the fixed bucket, and at least for watering It is comprised with various piping 14 grade | etc., Including these. Such a dismantling machine 15 is also called a turning construction machine or a hydraulic excavator. In addition, since the structure itself of the demolition machine 15 is well-known, description here is abbreviate | omitted.

  FIG. 2 is an enlarged view of the pipe 14 provided in the dismantling machine 15 described above, partially broken from the upper surface direction.

  Referring to FIG. 2, a plurality of pipes 14 are provided in the main part of the work machine 13 for each type, and the pipe connection structure of the present invention is suitable for use in the connection locations of the pipes 14. In particular, when adjusting the length of the boom arm of the work machine 13, since the hydraulic hose is frequently attached and detached, it is desirable to be able to accurately identify the pipe of the connection partner.

  FIG. 3 is a diagram showing a schematic configuration of the pipe connection structure according to the embodiment of the present invention in a state before assembly. FIG. 3A is a partially broken view from the upper surface direction. FIG. 3B is a cross-sectional view in the left side direction. FIG. 3C is a view showing the internal structure with a part broken away from the side surface direction.

  3 (a), 3 (b), and 3 (c), this pipe connection structure is an example of a pipe 14 in which male type joints 3a that can be connected to each other are attached to the ends. When connecting a pipe 1 and a hose 2 which is another example of a pipe 14 having a female-type joint 3b attached to an end thereof, an erroneous connection preventing function is provided.

  More specifically, this misconnection prevention function includes a pair of ring-shaped clamp joints 5a and 5b that are respectively attached and fixed to a place separated from the joint 3a of the pipe 1 and a place separated from the joint 3b of the hose 2. One member. In addition, the end faces facing each other have a shape to be fitted and fitted, and the vicinity of the opposite end faces on the opposite side to the facing end faces is attached and fixed to predetermined locations of the pair of clamp joints 5a and 5b, respectively. The pair of identification plates 4a and 4b are used as other members.

  Each of the pair of clamp joints 5a and 5b has a structure that can be opened and closed by connecting a pair of semicircular shell-like members with a hinge. With the pair of clamp joints 5a and 5b opened, the screw 10 is inserted into the screw hole provided in the flange on the opposite side of the hinge over the outer peripheral surface of the pipe 1 and hose 2, so that the pair of clamp joints 5a 5b is attached and fixed to the outer peripheral surfaces of the pipe 1 and the hose 2, respectively. In the pair of identification plates 4a and 4b, opposing end surfaces are convex portions 6 in the identification plate 4a, and concave portions 7 in the identification plate 4b. The pair of identification plates 4a and 4b can be connected to a pair of clamp joints by inserting screws 9 into two screw holes provided in the vicinity of the opposite end surfaces of the pair of identification plates 4a and 4b. It is attached and fixed to 5a and 5b, respectively.

  Incidentally, as shown in FIGS. 3A and 3C, the dimension of the clamp joint 5a in the diameter direction of the pipe 1 is smaller than the dimension of the clamp joint 5b in the diameter direction of the hose 2. Therefore, if the identification plate 4a is attached to the clamp joint 5a as it is, a step is generated between the identification plate 4b and the identification plate 4b attached to the clamp joint 5b, and the fitting state may be hindered. Accordingly, as shown in FIGS. 3 (b) and 3 (c), the identification plate 4a is provided on the opposite side attached to the clamp joint 5b with a spacer 8 interposed in the radial direction of the pipe 1 of the clamp joint 5a. The position is adjusted so that it is flush with the identification plate 4b. On this basis, the screw 9 is fastened to the clamp joint 5a attached to the outer peripheral surface of the pipe 1 to fix the identification plate 4a.

  FIG. 4 is a view showing a modified example of the identification plates 4a and 4b used in the pipe connection structure described above from the upper surface direction, and FIG. 4 (a) is a diagram of the shape shown in FIG. 3 (a). (B) is a diagram of an example of a deformed shape, and FIG. (C) is a diagram of another example of the deformed shape.

  Referring to FIG. 4 (a), the pair of identification plates 4a, 4b is a metal plate made of stainless steel, steel, or the like, each of which has a substantially rectangular appearance, and is spaced apart from the opposing end face on the short side thereof. Two screw holes for fastening the screw 9 are provided in the vicinity of the end face. Concerning the opposing end surfaces on the short side, the identification plate 4a is provided with a convex portion 6 at one central portion, and the identification plate 4b is provided with a concave portion 7 at one central portion.

  Referring to FIG. 4B, the pair of identification plates 4a 'and 4b', which are an example of a deformed shape, has substantially the same appearance and material as the pair of identification plates 4a and 4b. Further, the same is true in that two holes for fastening the screw 9 are provided in the vicinity of the end face that is opposite to the opposite end face on the short side. However, with respect to the opposing end faces on the short side, the identification plate 4a ′ has a convex portion 6 ′ at one upper location, and the identification plate 4b ′ has a concave portion 7 ′ at one upper location. It is different.

  Furthermore, referring to FIG. 4C, the appearance and material of a pair of identification plates 4a "and 4b" which are other examples of deformed shapes are substantially the same as those of the pair of identification plates 4a and 4b. . Further, the same is true in that two holes for fastening the screw 9 are provided in the vicinity of the end face that is opposite to the opposite end face on the short side. However, with respect to the opposing end faces on the short side, the identification plate 4a ″ is provided with projections 6a and 6b at two locations, the upper location and the lower location, and the identification plate 4b ″ is recessed at two locations, the upper location and the lower location. The difference is that 7a and 7b are provided.

  The above-mentioned identification plate 4a with respect to the identification plate 4a, identification plate 4b 'with respect to the identification plate 4a', identification plate 4b "with respect to the identification plate 4a" are fitted in different patterns depending on the pipe connection type. Just do it. In such a case, if the mating mating partner is different, the connection cannot be made, so that erroneous connection can be prevented appropriately. Incidentally, the shapes to be fitted are shapes other than the above-described convex portions 6, 6 ', 6a, 6b and concave portions 7, 7', 7a, 7b, for example, semicircular shapes, triangular convex portions, semicircular shapes, A triangular recess may be used. In any case, as described with reference to FIGS. 4 (a), 4 (b), and 4 (c), it is only necessary that the shapes to be fitted are different for each pipe connection type.

  FIG. 5 is a diagram showing a schematic configuration of the pipe connection structure shown in FIG. 3 in a state after assembly. FIG. 5A is a partially broken view from the upper surface direction. FIG.5 (b) is the figure shown partially broken from the side surface direction. FIG. 5C is a diagram showing the internal structure exposed in a partially broken manner from the side surface direction.

  5 (a), 5 (b) and 5 (c), in the post-assembly state of the pipe connection structure, the tip of the male type joint 3a is inserted into the female type joint 3b. And assembled. At the same time, the convex portion 6 of the identification plate 4a is fitted into the concave portion 7 of the identification plate 4b. In this pipe connection structure, the identification plate 4a attached to the clamp joint 5a via the spacer 8 and the identification plate 4b attached to the clamp joint 5b connect the joint 3a of the pipe 1 and the joint 3b of the hose 2. It also becomes a reinforcing member when performing. Moreover, the connection state (slackness) of the hose 2 can be confirmed from the state in which the convex portion 6 of the identification plate 4a is fitted in the concave portion 7 of the identification plate 4b. For example, when the convex portion 6 and the concave portion 7 are fitted with a gap, it can be easily found by visual confirmation that there is a problem in the connection state of the pipe.

  In the above-described embodiment, the case where the pipe 1 and the hose 2 are mainly connected is exemplified as the connection between the pipes. However, the present invention can be applied even when the pipes 1 are connected to each other or the hoses 2 are connected to each other. For example, the identification plate 4b 'corresponding to the identification plate 4a' shown in FIG. 4B is applied to the connection between the pipes 1, and the connection between the hoses 2 is made to the identification plate 4a "shown in FIG. 4C. A case where the identification plate 4b ″ is applied can be exemplified. In any case, if the pipe connection structure according to the present embodiment is applied to the connection between pipes, the function as a reinforcing member stabilizes the connection mechanically, and the shape to be fitted is difficult to collapse, so it is identified by deterioration. It will not be difficult. In addition, it has the advantage that the versatility and compatibility of piping parts is high (no damage).

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the technical scope thereof, and all the technical matters included in the technical idea described in the scope of claims can be understood. The subject of the present invention. The above-described embodiment shows a preferable example, but those skilled in the art can realize various modifications from the disclosed contents, and these are described in the appended claims. Included in the technical scope. In the above-described embodiment, the metal identification plate is exemplified. However, the material of the identification plate can be applied to the present invention other than metal, for example, a hard plastic.

1 Pipe 2 Hose 3a, 3b Joint 4a, 4a ', 4a ", 4b, 4b', 4b" Identification plate 5a, 5b Clamp joint 6, 6 ', 6a, 6b Convex part 7, 7', 7a, 7b Concave part 8 -10 screw 11 lower traveling body 12 upper turning body 13 working machine 14 piping 15 dismantling machine

Claims (5)

A pipe connection structure that is used in construction machinery and has a function of preventing erroneous connection between pipes with joints that can be connected to each other attached to the ends,
A pair of clamp joints that are respectively attached and fixed to a place separated from the joint of one pipe and a place separated from the joint of the other pipe; A pipe connection structure comprising: a pair of identification plates that are attached and fixed to predetermined portions of the pair of clamp joints in the vicinity of the end surfaces on the opposite side to the opposite end surfaces. In the pipe connection structure according to claim 1,
The pipe connection structure characterized in that the fitting shapes of the pair of identification plates are different patterns for each pipe connection type. In the pipe connection structure according to claim 1 or 2,
The pipe connection structure, wherein the fitting shapes of the pair of identification plates are at least one or more convex portions and one or more concave portions serving as mating portions on the other side of the convex portions. In the pipe connection structure according to claim 1,
The pair of clamp joints have different dimensions in the radial direction of the pipe,
In the pair of identification plates, the identification plate attached to the clamp joint on the side where the dimension in the radial direction of the pipe of the pair of clamp joints is small is arranged on the larger side of the pair of clamp joints via a spacer. Piping connection characterized in that the position is adjusted so that it is flush with the counterpart identification plate attached to the clamp joint and is fixedly attached to the clamp joint on the side where the dimension in the radial direction of the pipe is small Construction.   A construction machine comprising a pipe to which the pipe connection structure according to claim 1 is applied.