JP2013233960A - Railroad tie - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a railroad tie having an exposed surface limited to a range capable of removing contaminants from the outside, capable of preventing dust or the contaminants from infiltrating into an interior space while maintaining easy handling performance as the same as the conventional one, that is, even when decontamination is needed.SOLUTION: A blind plate 5 is provided to seal an interior space 2 with a depth having a degree that a worker can insert his/her finger into from openings at both ends of the railroad tie 1 made of a tubular hollow extruded material, so that an opening recessed part 6 with a depth having a degree that the worker can insert his/her hand into both the ends is formed.

Description

  The present invention relates to sleepers. More specifically, the present invention relates to a sleeper used as a stand for temporary placement when, for example, lifting (unloading) or transporting heavy objects such as large machinery. In addition, in this specification, the sleeper is used as the meaning including the square tube etc. which are utilized as a lever material.

  When moving heavy objects such as large machinery, it is common to temporarily place and support the machinery lifted by a jack or the like on a cradle for temporary placement called sleepers. Conventionally, this sleeper has been used in the form of square blocks mainly made of natural wood, but in recent years it has become difficult to handle due to its heavy weight and is uneasy in terms of pressure resistance and durability. A square tube by hollow extrusion molding of an aluminum alloy has been proposed (Patent Document 1).

  In addition, in order to stock building materials, steel bars, steel pipes, etc., aluminum square tubes may be used instead of wooden saws.

  The length, width, height, thickness, etc. of this aluminum sleeper are appropriately selected according to the application. And the reinforcement wall is provided in internal space according to a use, and the intensity | strength required as a sleeper is ensured. For example, in the case of aluminum sleepers made of a high-strength aluminum alloy hollow extrusion material for lifting and transporting heavy objects, the vertical and horizontal reinforcing walls are cross-shaped in the internal space during hollow extrusion processing. The required strength is ensured by being integrally formed so as to be disposed on the surface (Patent Document 1).

Japanese Utility Model Publication No. 6-31527

  However, since aluminum square tubes formed by hollow extrusion inevitably have openings at both ends, dust and contaminants floating in the work space up to the internal space (in this specification, these are collectively referred to as contaminants, etc.) Cannot be prevented from entering and depositing. In addition, when an aluminum square tube is used as a sleeper or a lever material, the opening area of the internal space cannot be increased in order to increase load resistance, and the space becomes narrower and deeper than the length.

  For this reason, even when it becomes necessary to wash or decontaminate the inside of the tube, it is difficult to wash out the inside. In particular, in a sleeper in which the internal space is partitioned by a cross-shaped reinforcing wall in order to increase the load resistance, the space partitioned by the reinforcing wall is narrower and longer than the opening area. Because it is a long space, it is impossible to decontaminate contaminants that are attached deeply. Even if it is not a 6-7 m long sleeper, it is difficult to wash the inside even if it is 1-2 m long.

  This means that when sleepers made of aluminum are used to move heavy objects such as large machinery in a contaminated area that needs to be decontaminated, for example, in a contaminated environment, the sleepers themselves are contaminated. In addition, since radioactive materials and dust containing radioactive materials are taken deep inside the interior space, decontamination becomes extremely difficult, which is a big problem. Even if the outside surface of the aluminum sleeper could be easily decontaminated, if the inside could not be decontaminated, it would eventually have to be discarded as a radioactive pollutant, and discarding all the sleepers would increase the amount of waste processed Therefore, it is not desirable.

  On the other hand, the openings at both ends of the sleepers are also openings necessary for an operator to insert his / her hand and lift the sleepers when the sleepers themselves are transported and placed at a necessary place. For this reason, it is not preferable to block both ends of the tube because it impairs the ease of carrying the sleepers. Even though sleepers are said to be hollow extruded products of aluminum alloy, if they become large, they will have a corresponding heavy weight, for example, about 20 to 30 kg or more. If you do not carry it by hooking it, it will be difficult to apply force and it will be difficult to work.

  Therefore, an object of the present invention is to provide a sleeper capable of preventing dust and contaminants from entering the internal space while maintaining the same ease of handling as before. In other words, even when decontamination is required, an object is to provide a sleeper whose exposed surface is limited to a range that can be easily decontaminated from the outside.

  In order to achieve such an object, the invention described in claim 1 is a sleeper made of a tubular hollow extruded material, and is provided with a blind plate that seals the internal space at a depth enough to allow the operator's hand to be inserted from both ends of the sleeper. An open recess having a depth enough to allow a worker's hand to be put into both ends is formed.

  Moreover, it is preferable that the sleeper concerning this invention equips the open recessed part of the both ends with a hook, respectively. Here, the hook may be fixed to the sleeper body or may be detachable. Specifically, a hook is swingably attached to a blind plate forming an open recess or a peripheral wall portion of a sleeper outside the blind plate via a bracket, or a hook is fastened by a fastener such as a bolt or a nut. You may make it attach so that attachment or detachment is possible.

  The sleeper according to the present invention is characterized in that bolt through holes are provided on at least two opposing wall surfaces in a peripheral wall portion defining an open recess outside the blind plate.

  Moreover, the sleeper according to the present invention is a square tube made of a hollow extruded material made of a high-strength aluminum alloy, and a pair of reinforcing walls of a vertical wall and a horizontal wall that connect between opposing wall surfaces of the peripheral wall are formed in a cross shape in the internal space. It is characterized by being arranged.

  In the sleeper according to claim 1, since the inner space is covered with the blind plate, and an open recess is formed on the outer side of the blind plate so that the operator's hand can be inserted from both end openings, the same handling as before While maintaining ease, dust and contaminants can be prevented from entering the internal space. Moreover, even when decontamination is required, the exposed surface is limited to the extent that it can be easily decontaminated from the outside, so that the surface area itself that can be easily decontaminated from the outside and decontaminated is extremely small. Dyeing work time can be shortened. In addition, the decontamination of the open recess is relatively shallow with the blind plate as the bottom surface and the space is full of the internal space, so that the work becomes very easy.

  Furthermore, when the hook is provided using the space of the open recess on the outside of the blind plate, the operator can hold the hook and carry it, or in some cases, it is easy to use the hook on a heavy machine such as a crane. Since it can be lifted and hung by hanging it on, it is easier to transport sleepers and mechanize installation work. Even if the sleeper is made of a relatively lightweight aluminum alloy hollow extrusion material, if it becomes large, the weight of the sleeper becomes a corresponding weight, for example, about 20 to 30 kg or more. Even if it can be applied, it is desirable to mechanize it with a heavy machine so that it can be easily carried and lifted and hung. When the hook is detachably equipped, it can be attached as necessary to prevent an unnecessary weight increase in a situation where the hook is not required.

  In addition, when the bolt through holes are provided on the two wall surfaces facing each other on the peripheral wall portion that defines the open recess, when a plurality of sleepers are stacked or used side by side, a plurality of sleepers are used using the bolt through holes. Since it can be blocked by being connected vertically or horizontally or vertically and horizontally, the strength and reliability as a temporary holder can be improved.

  Moreover, the sleeper according to the present invention is a square tube made of a hollow extruded material made of a high-strength aluminum alloy, and a pair of reinforcing walls of a vertical wall and a horizontal wall that connect between opposing wall surfaces of the peripheral wall are formed in a cross shape in the internal space. Because it is installed, not only vertical and horizontal reinforcement walls, but also the vicinity of both ends are reinforced by blind plates orthogonal to them, further improving pressure resistance and durability, for lifting and transporting heavy objects It becomes more suitable as.

It is a fragmentary sectional view which shows one Embodiment which implemented the sleeper concerning this invention for the lifting and conveyance of a heavy article. It is sectional drawing which follows the II-II line | wire of FIG. It is sectional drawing which follows the III-III line of FIG. It is a front view which shows the state made into the block by stacking and connecting the sleepers of this invention. It is a front view which shows the state made into blocks by connecting the sleepers of this invention side by side. It is a partial expanded longitudinal cross-sectional view which shows embodiment which provided the hook in the open recessed part of the sleeper of this invention. It is a partial expanded longitudinal cross-sectional view which shows other embodiment provided with the hook in the open recessed part of the sleeper of this invention.

  Hereinafter, the configuration of the present invention will be described in detail based on embodiments shown in the drawings.

  The sleeper according to the present invention is formed of a tubular hollow extruded material, provided with a blind plate that seals the internal space with a depth enough to allow the operator's hand to be inserted through the opening at both ends, and the operator's hand can be inserted at both ends. It is provided so as to form an open recess having a certain depth. Here, the sleeper according to the present invention is a tubular product obtained by hollow extrusion, and may be used as it is as a tubular product composed of only a peripheral wall without providing a reinforcing wall depending on the application that does not require relatively strong strength. However, when it is used for lifting / conveying heavy objects, it is necessary that the vertical and horizontal reinforcing walls are integrally formed in the interior space during hollow extrusion processing so that they are arranged in a cross shape. Strength is secured.

  1 to 5 show an embodiment in which a sleeper according to the present invention is suitable for lifting and transporting heavy objects. The sleeper 1 is a rectangular tube (a tube having a rectangular cross section) made of a hollow extruded material made of a high-strength aluminum alloy, and a pair of reinforcing walls 3 including a vertical wall and a horizontal wall that connect the opposing wall surfaces of the peripheral wall 4 are formed in an internal space. 2 is arranged in a cross shape. In the illustrated example, the inner space 2 of the sleeper 1 is divided into eight square columnar chambers by a vertical and horizontal reinforcing wall 3 arranged in a cross shape. . In addition, the inner corner (entrance corner) of the part where the vertical and horizontal wall surfaces intersect with each other is formed into a shape in which stress concentration is difficult to occur, for example, a curved surface with a radius of 5 to 10 mm. It is considered to be relatively light and easy to handle while ensuring excellent load carrying capacity by relaxing concentration.

  At both ends of the sleeper 1, the reinforcing wall 3 is removed by grinding or fusing, and an internal space 2 including only the peripheral wall 4 is formed. And the blind board 5 which seals an inside is provided in the both-ends opening part of the sleeper 1, the internal space 2 is sealed, and the open recessed part 6 is formed in the outer side of the blind board 5. As shown in FIG. The depth of the open recess 6 in the depth direction is such that the operator can insert his / her hand into the open recess 6 so that his / her hand can be inserted from the end of the sleeper. In addition, the code | symbol 9 in a figure is a fillet welding bead which welds the blind board 5 and the surrounding wall 4 of the sleeper 1. FIG.

  The open recess 6 is not effective in that the exposed surface is limited to a range where it can be easily decontaminated from the outside even if it is too deep, and there is a problem that it is difficult for the operator to put it on if it is too shallow. . Therefore, in the present embodiment, the reinforcing wall 3 is removed to a depth that allows a worker's hand to be inserted, for example, a depth of about 40 mm, and an aluminum blind plate 5 having a thickness of 5 mm is disposed there, and the periphery is located within the peripheral wall 4. The entire circumference is sealed by fillet welding so as to be fixed to the peripheral surface. As a result, a relatively shallow and wide (an original width of the internal space 2 that is not divided by the reinforcing wall 3) open recess 6 having a depth of about 35 mm is formed, and a range that can be easily decontaminated from the outside. The exposed surface is limited.

  Further, at the peripheral wall 4 portion that defines the open recess 6 outside the blind plate 5, bolt through holes 8 are provided on at least two opposing wall surfaces. Although the sleepers 8 can be connected to each other if there are at least one bolt through-hole 8, it is preferably arranged at two or more locations at equal intervals in the width direction from both side walls. For example, in this embodiment, two bolt through-holes 8 are arranged at equal intervals at a width of 1/3 from both side walls in the width direction.

  The length, width and height of the sleeper 1 and the thickness of the peripheral wall and the reinforcing wall are not limited to specific dimensions, and are appropriately selected according to the application. For example, in the case of the present embodiment, as shown in FIG. 2, the internal space 2 is further divided into eight chambers by reinforcing walls 3 arranged at equal intervals in a rectangular tube having a height of 150 mm, a width of 300 mm, and a thickness of 5 mm. Has been. In this case, since the ratio of height and width is 1: 2, two types of heights of 150 mm and 300 mm and these two or more sleepers 1 are combined depending on whether the sleeper 1 is horizontal or vertical. Various heights can be set by stacking. Of course, the dimensions and the aspect ratio are not limited. For example, a square tube having a height of 175 mm and a width of 200 mm, that is, when the ratio of height to width is 1.75: 2, a finer height can be set. It becomes. Moreover, although not shown in figure, the outline shape of the aluminum sleeper 1 is not restricted to the illustrated rectangle, A square may be sufficient. In this case, the cross section is formed into a cross-section of a “field” shape having a pair of reinforcing walls arranged in a cross shape by connecting the opposing wall surfaces to the center of each wall surface of the rectangular peripheral wall. Further, the length of the aluminum sleeper 1 is not limited to a specific length, and can be appropriately selected according to the application. For example, in general, the length is set in a range of about several tens of cm to 7 m.

  The material constituting the sleeper 1 is, for example, an A6000-based Al—Si—Mg-based alloy containing 0.20 to 0.9 wt% of Si and 0.40 to 0.9 wt% of Mg, with the balance being aluminum and inevitable impurities. Particularly, a T5 tempered material made of 6NOl alloy is preferably used. The use of 6O63 alloy is also preferred. However, the material of the sleepers 1 is not limited to this.

  According to the aluminum sleeper 1 configured as described above, since the internal space 2 is sealed by the blind plate 5 disposed in the vicinity of the opening at both ends, it is possible to prevent contaminants and the like from entering the internal space 2. . In addition, the operator's hand can be put in the open recess 6 on the outside of the blind plate 5 and can be handled in the same manner as before over the edge of the opening of the sleeper 1. Moreover, when decontamination is required, the exposed surface is limited to a range that can be easily decontaminated from the outside, so that the decontamination work can be easily decontaminated and the surface area itself that must be decontaminated is very small. Will be quicker. In addition, the use of bolt through holes 8 provided in the peripheral wall 4 portion of the open recess 6 allows the sleepers to be stacked or the sleepers to be arranged to be connected to each other to form a block. Strength and reliability can be improved.

  6 and 7 show another embodiment of an aluminum sleeper. This aluminum sleeper 1 includes hooks 12 in open recesses 6 at both ends. Here, the hook 12 may be fixed to the sleeper 1 or may be detachably attached. For example, as shown in FIG. 6, a bracket 13 is welded to a portion of the blind plate 5 or the sleeper peripheral wall 4 outside the blind plate 5 forming the open recess 6, and both ends 12a of the hook 12 are rotated there. The hook 12 is mounted so as to be swingable. For example, in the present embodiment, the bracket 13 is welded to the blind plate 5 so that the hook 12 is supported so as to swing and rotate. In this case, the hook 12 is provided so as to be accommodated in the space of the open recess 6 when suspended by its own weight, and consideration is given to not taking up space when the hook 12 is not used. In this embodiment, the hook 12 has, for example, a U shape or a crank shape, and bent shaft portions (both ends 12a) at both right and left ends thereof are rotatably supported by the bracket 13, respectively. There is no particular limitation, and a hook having a shape and support structure suitable for work can be selected as appropriate. For example, a plurality of hooks may be arranged at equal intervals so as to have an even load distribution.

  Moreover, the hook 12 does not need to be fixed to the sleeper 1 at all times, and may be detachably provided so as to be attached only when necessary. For example, as shown in FIG. 7, the hook 12 is attached as needed using a bolt through hole 8 or using another hole (not shown) provided separately from the bolt through hole 8. It may be possible. For example, in the case of the present embodiment, male screws are cut at the left and right base ends of the U-shaped hook 12 to form a bolt part 14, and the bolt part 14 is separated from the bolt through hole 8 or the bolt through hole 8. The nut 15 is screwed and fixed after passing through another hole provided. In some cases, a plurality of hooks may be arranged at equal intervals so as to have an even load distribution. Even in the case of such a detachable hook 12, the shape and fixing structure of the hook 12 are not limited to a specific shape and fixing structure, and a hook or fixing structure having a shape suitable for work is appropriately used. Selectable.

  As described above, when the hooks 12 are respectively provided in the open recesses 6 at both ends of the aluminum sleeper 1, the operator can hold the hook 12 and carry it. In some cases, the hook 12 is attached to a heavy machine such as a crane. Can be easily hooked up and down using it.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, in the present embodiment, an example of a sleeper made of a hollow extruded material of a high-strength aluminum alloy such as an Al—Si—Mg-based alloy has been described, but the present invention is not particularly limited thereto. Hollow extruded materials such as steel and stainless steel may be used.

  In the present embodiment, an example of a sleeper in which the internal space 2 is divided into a plurality of spaces by the reinforcing walls 3 arranged in a cross shape has been described. However, the present invention is not particularly limited to this. The present invention can be applied to a sleeper having a reinforcing wall only on either side or a square tube of a single internal space having no reinforcing wall at all. For example, in order to stock building materials, steel bars, steel pipes, etc., aluminum square tubes may be used as a saw material or a rack material. In such an application, when a relatively high load resistance is not required, it may be configured by a simple square tube in which a reinforcing wall is not formed in the internal space. Even in this case, although not shown, a blind plate for sealing the inside is provided in the vicinity of both ends of the sleeper so that the internal space is sealed and an operator can put his hand on the outside of the blind plate. An open recess with a depth is formed. It is preferable that the depth of the open recess in the depth direction is as shallow as possible, and it is sufficient if a space having a depth enough to allow an operator to insert his / her hand and be hooked is formed.

DESCRIPTION OF SYMBOLS 1 Sleeper 2 Internal space 3 Reinforcement wall 4 Peripheral wall 5 Blind plate 6 Open recessed part 7 Hook 8 Connecting bolt through hole 9 Weld bead 12 Hook

Claims (5)

In a sleeper made of a tubular hollow extruded material, a blind plate that seals the internal space with a depth that allows the operator's hand to be inserted through the opening at both ends is provided, and an open recess having a depth that allows the operator's hand to be inserted at both ends. A sleeper characterized by the formation of The sleeper according to claim 1, wherein each of the open recesses is provided with a hook. The sleeper according to claim 2, wherein the hook is detachable. The sleeper according to any one of claims 1 to 3, wherein a bolt through hole is provided on at least two opposing wall surfaces in a peripheral wall portion that forms the open recess outside the blind plate. The sleeper is a rectangular tube made of a hollow extruded material made of a high-strength aluminum alloy, and a pair of reinforcing walls, a vertical wall and a horizontal wall that connect between the opposing wall surfaces of the peripheral wall, are arranged in a cross shape in the internal space. The sleeper according to any one of claims 1 to 4, characterized in that:

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