Gate rail device

Abstract

To provide a portal rail device capable of easily changing the height of a rail and increasing rigidity of a support pillar for supporting the rail.SOLUTION: The portal rail device comprises at least one support pillar for supporting a rail. The at least one support pillar has: first and second nested pillar parts: a plurality of pairs of positioning holes provided in the second pillar part; a positioning rod inserted into one of the positioning holes; a positioning recess which is provided in the first pillar part and in which the positioning rod inserted into the second pillar part enters; and bolts and nuts for fixing the first and second pillar parts. One of the first and second pillar parts has a pair of first holes at a plurality of positions, and the other pillar part has second and third coaxial holes. One of the first holes is held coaxially with the second and third holes when the positioning rod enters into the positioning recess. The bolts are inserted into the third, first and second holes in order so as to be engaged with the nuts.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a portal rail device used in a crane device. [Background technology]

[0002] Crane equipment (including stationary and portable types) is an example of equipment that suspends and moves heavy loads. In such crane equipment, for example, a gate-type rail device equipped with a rail that guides the movement of a hoist that suspends loads and a pair of support pillars that support both ends of the rail in the extension direction from below is used, and the height of the rail and the hoist installed on the rail are often fixed. In addition, a crane equipment has been proposed in which the support pillars are made extendable so that the height of the rail and the hoist can be adjusted to suit the usage environment (see Patent Document 1).

[0003] The crane apparatus disclosed in Patent Document 1 has, for example, lifting poles that support the vicinity of both ends of a traveling rail, support columns that support the lifting poles on both sides at any height, lifting rollers provided below the lifting poles, and a hoisting means to which a wire that passes through the lifting rollers is connected, and the lifting poles are raised and lowered by winding up or letting out the wire by the hoisting means. Also, in the crane apparatus disclosed in Patent Document 1, multiple height adjustment holes are provided in the support columns, and the descent of the lifting poles is regulated by inserting pins into the height adjustment holes. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2002-356296 A Summary of the Invention [Problem to be solved by the invention]

[0005] The crane device disclosed in Patent Document 1 is equipped with a dedicated hoisting means for adjusting the height, and the entire device is complex and heavy. In addition, since the upper part of the crane device is heavy, the support column is strengthened by, for example, tension rods. On the other hand, in a configuration for lifting and lowering a lifting pole as disclosed in Patent Document 1, in which a pin is inserted into a height adjustment hole provided in the support column to regulate the descent of the lifting pole, a gap is generated between the inner wall surface of the lifting pole and the outer wall surface of the support column into which the lifting pole is inserted, so that the rail and the lifting pole fixed to the rail are likely to wobble relative to the support column, and the crane device becomes unstable. In such a method of adjusting the height of the lifting pole by inserting a pin into one of a plurality of height adjustment holes provided in the support column, the rigidity of the connection between the support column and the lifting pole is low, and shaking is likely to occur, making operation using the lifting means (hoist) dangerous.

[0006] The present invention has been made in consideration of such problems, and aims to provide a technology in a gate-type rail device in which the height of the rail can be adjusted, which makes it easy to change (adjust) the height of the rail and also enables the rigidity of the support pillars that support the rail to be increased. [Means for solving the problem]

[0007] In order to solve such problems, the portal rail device of the present invention is a height-adjustable portal rail device having a travel means for lowering a hoist, a rail for guiding the movement of the travel means, and a plurality of support pillars for supporting both ends in the extension direction of the rail from below, at least one of the plurality of support pillars has a cylindrical first pillar portion for fixing one end in the extension direction of the support pillar to the rail, and a cylindrical second pillar portion for forming a nested telescopic structure between the first pillar portion and the support pillar, the support pillar being provided at a plurality of positions in the extension direction of the second pillar portion and having a pair of positioning holes penetrating the outer circumferential surface of the second pillar portion, a positioning rod to be inserted into any of the plurality of pairs of positioning holes, and a positioning rod provided at the other end in the extension direction of the first pillar portion and having a position into which the positioning rod inserted into the second pillar portion fits. the first column portion and the second column portion as an inner tube have a pair of first hole portions at a plurality of positions along the extension direction of the column portion, and the other column portion of the first column portion or the second column portion as an outer tube has a second hole portion and a third hole portion coaxial with the second hole portion, and when the positioning rod enters the positioning recess, any pair of holes among the pair of first hole portions provided at the plurality of positions is located between the second hole portion and the third hole portion and is held coaxially with the second hole portion and the third hole portion, and the bolt is inserted from the third hole portion side through the third hole portion held coaxially, the pair of first hole portions, and the second hole portion in that order, and is screwed into the nut.

[0008] Further, the third hole portion has an inner diameter larger than the inner diameter of the first hole portion, and a washer having an outer diameter that exceeds the inner diameter of the first hole portion and is equal to or smaller than the inner diameter of the third hole portion is provided on the bolt, and when the bolt and the nut are fixed together, the washer enters the third hole portion under the pressure of the head of the bolt adjacent to the nut and abuts against the peripheral portion of the first hole portion, and when the bolt and the nut are fixed together, the head of the bolt adjacent to the nut presses the washer, causing the innermost column of the first and second column portions that form the nested expandable structure to abut against the inner surface of the outermost column portion. Effect of the Invention

[0009] According to the present invention, a lightweight gate-type rail device is provided that allows the rail height to be easily changed and the rigidity of the support pillars that support the rail to be increased. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view showing a configuration of a gate rail device according to an embodiment of the present invention; [Diagram 2] 2 is a perspective view showing the configuration of an upper post and a lower post of the gate rail device shown in FIG. 1. [Diagram 3] 2 is a partial cross-sectional view showing a state before a positioning rod of the gate rail device shown in FIG. 1 is attached to a lower pillar. [Figure 4] 2 is a partial cross-sectional view showing a state before an upper pillar is attached to a lower pillar of the gate rail device shown in FIG. 1. [Diagram 5] 2 is a partial cross-sectional view showing a state in which an upper pillar is positioned on a lower pillar of the gate rail device shown in FIG. 1. [Figure 6] 2 is a partial cross-sectional view showing a state in which an upper post and a lower post are fixed using bolts and nuts in the gate rail device shown in FIG. 1. [Figure 7] 1 is an oblique view showing the configuration of a gate rail device using support pillars with a nested, extendable structure in which the upper pillar is on the inside and the lower pillar is on the outside. [Figure 8] 8 is a perspective view showing the configuration of an upper post and a lower post of the gate rail device shown in FIG. 7. [Figure 9] 2 is a partial cross-sectional view showing a state in which an upper post and a lower post are fixed using bolts and nuts, without using washers, in the gate rail device shown in FIG. 1. FIG. [Figure 10] FIG. 11 is a perspective view showing the configuration of a gate-type lace device in which one of the two support columns is a support column with a nested, expandable structure. [Figure 11] 1 is a perspective view showing the configuration of a gate-type rail device having two parallel rails. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] An embodiment of a gate rail device of the present invention will be described below with reference to the drawings. The gate rail device 10 shown in Fig. 1 is used for lifting luggage, as well as for transporting the suspended luggage to a destination area and lowering the luggage. The gate rail device 10 can also change (adjust) the height of a rail 11 (described later) according to the environmental conditions in which it is used.

[0012] 1, the left-right direction of the gate rail device 10 is defined as the x-direction or -x-direction, the front-rear direction of the gate rail device 10 is defined as the y-direction or -y-direction, and the up-down direction of the gate rail device 10 is defined as the z-direction or -z-direction.

[0013] As shown in FIG. 1, the gate-type rail device 10 has a rail 11, support columns 12 and 13, and a caster 14. The rail 11 is a beam member that is spanned between the upper parts of the support columns 12 and 13. The rail 11 has two wheel treads (not shown) that extend along the extension direction of the rail 11 (for example, the x direction or the -x direction in FIG. 1) on the lower surface of the rail 11. The two wheel treads are provided to allow a traveling device 15 called a trolley (suspension means) to travel along the extension direction of the rail 11. Here, the traveling device 15 corresponds to the traveling means described in the claims. The traveling device 15 protrudes below the rail 11 from a groove provided between the two wheel treads provided along the extension direction of the rail 11. The traveling device 15 suspends a hoist 16 from the portion protruding below the rail 11. Although details of the hoist 16 are omitted, it is a device used to hoist and lower luggage, such as a chain block.

[0014] The support columns 12, 13 are provided at both ends of the rail 11 in the extension direction (e.g., x-direction or -x-direction in Fig. 1) and support both ends of the rail 11 from below so that the rail 11 is in a substantially horizontal state. The support column 12 (13) has an upper column 21 (31) extending along the vertical direction (z-direction or -z-direction in Fig. 1) and a lower column 22 (32) inserted into the upper column 21 (31) from a lower end in the extension direction of the upper column 21 (31) (z-direction or -z-direction in Fig. 1) and fixed together with the upper column 21 (31) at an arbitrary position. The upper column 21 (31) and the lower column 22 (32) have a nested telescopic structure, for example, with the upper column 21 (31) as an outer cylinder and the lower column 22 (32) as an inner cylinder. Here, the upper pillar 21 (31) corresponds to a first pillar portion recited in the claims, and the lower pillar 22 (32) corresponds to a second pillar portion recited in the claims.

[0015] The upper column 21 (31) has an outer peripheral shape of a cross section perpendicular to the extension direction of the upper column 21 (31) (z direction or -z direction in Fig. 1) of the upper column 21 (31) that is a square steel pipe member, and the size of the internal space in the cross section is, for example, 80 mm x 80 mm. One end of the upper column 21 (31) in the extension direction of the upper column 21 (31) is fixed to one end (the other end) in the extension direction of the rail 11 (x direction or -x direction in Fig. 1) via a bracket 24 (34). When the upper column 21 (31) is fixed to the rail 11, the upper column 21 (31) extends below the rail 11 and is perpendicular to the rail 11. Here, the rail 11 and the bracket 24 (34), and the upper column 21 (31) and the bracket 24 (34) are fixed by fastening means such as bolts and nuts not shown. In addition, the upper pillar 21 (31), i.e., the first pillar portion that becomes the outer cylinder, may be a cylinder having a U-shaped horizontal cross section as long as it can be assembled with the lower pillar 22 (32) described next.

[0016] The lower column 22 (32) has a cross section perpendicular to the extension direction of the lower column 22 (32) that is a square steel pipe member, and the size of the internal space in the cross section is, for example, 70 mm x 70 mm, and the outer size is 78 mm x 78 mm. The lower column 22 (32) may be a solid cylindrical steel pipe member (rod-shaped member). The lower column 22 (32) is fixed at one end in the extension direction of the lower column 22 (32) to the center in the extension direction of the leg 26 (36) (y direction or -y direction in FIG. 1) via a bracket 27 (37). When the lower column 22 (32) is fixed to the leg 26 (36), the lower column 22 (32) extends above the leg 26 (36) and is perpendicular to the leg 26 (36). Here, the lower pillar 22 (32) and the bracket 27 (37), and the leg 26 (36) and the bracket 27 (37) are fixed by fastening means such as bolts and nuts (not shown). In the gate rail device 10, the extension direction of the leg 26 (36) is not only perpendicular to the extension direction of the support pillar 12 (13), but also perpendicular to the extension direction of the rail 11. This prevents the gate rail device 10 from tilting in the front-rear direction of the gate rail device 10 (the y direction or -y direction in FIG. 1) around the lower end sides of the support pillars 12, 13.

[0017] The leg 26 (36) is a steel pipe member having a rectangular outer peripheral shape in a cross section perpendicular to the extension direction of the leg 26 (36) (y direction or -y direction in FIG. 1). As described above, the lower end of the lower column 22 (32) is fixed to the center of the leg 26 (36) via the bracket 27 (37). The leg 26 (36) has casters 14 at both ends in the extension direction of the leg 26 (36) (y direction or -y direction in FIG. 1). By providing the casters 14 at both ends in the extension direction of the leg 26 (36) (y direction or -y direction in FIG. 1), the worker can move the portal rail device 10 to the desired position while pushing it, instead of moving the portal rail device 10 by suspending it from another crane device.

[0018] Next, a detailed configuration of the support columns 12 and 13 will be described. Note that since the configuration of the upper column 21 and the lower column 22 constituting the support column 12 is the same as the configuration of the upper column 31 and the lower column 32 constituting the support column 13, only the upper column 21 and the lower column 22 constituting the support column 12 will be described, and the configuration of the upper column 31 and the lower column 32 constituting the support column 13 will be omitted.

[0019] As shown in Fig. 2, the lower end of the upper pillar 21 has the following configuration. That is, of the four side walls constituting the upper pillar 21, the side wall 21a facing the support pillar 13 is provided with a plurality of insertion holes 41 (only two are shown in Fig. 2) at predetermined intervals along the extension direction of the upper pillar 21 (z direction or -z direction in Fig. 2). Also, the side wall 21b facing the side wall 21a is provided with the same number of insertion holes 42 (two in Fig. 2) as the insertion holes 41, at positions coaxial with each of the plurality of insertion holes 41 (two in Fig. 2). Here, the insertion holes 41 correspond to a third hole portion recited in the claims, and the insertion holes 42 correspond to a second hole portion recited in the claims. Of the insertion holes 41, 42 provided in the side walls 21a, 21b of the upper pillar 21, the insertion hole 41 with a larger inner diameter may be provided in the side wall 21b, and the insertion hole 41 with a smaller inner diameter may be provided in the side wall 21a.

[0020] A bolt 52, which will be described later, is inserted into the insertion hole 41 provided in the side wall 21a and the insertion hole 42 provided in the side wall 21b when fixing the upper column 21 and the lower column 22 together. In addition to the bolt 52, a washer 55 provided on the bolt 52 is inserted into the insertion hole 41 provided in the side wall 21a. Here, the inner diameter of the insertion hole 41 provided in the side wall 21a is larger than the inner diameter of the insertion hole 42 provided in the side wall 21b so that the washer 55 can be inserted.

[0021] The lower ends of the two side walls 21a and 21b are provided with positioning recesses 43 and 44 cut in a semicircular shape at positions facing each other. When the upper column 21 is positioned relative to the lower column 22, ends of a positioning rod 51 inserted into positioning holes 46 and 47 of the lower column 22 described later enter the positioning recesses 43 and 44. As a result, the upper column 21 is positioned relative to the lower column 22 not only in the vertical direction (z direction or -z direction in FIG. 1) but also in the front-rear direction of the gate rail device 10 (y direction or -y direction in FIG. 1). Although the positioning recesses 43 and 44 are formed by cutting out the lower ends of the two side walls 21a and 21b in a semicircular arc shape, it is sufficient to position the upper column 21 relative to the lower column 22 not only in the vertical direction but also in the front-rear direction of the gate rail device 10, so the positioning recesses may be formed by cutting out the lower ends of the two side walls 21a and 21b in a triangular or rectangular shape, for example.

[0022] Of the four side walls constituting the lower column 22, the side wall 22a facing the support column 13 is provided with positioning holes 46 at multiple positions along the extension direction of the lower column 22 (z direction or -z direction in FIG. 2). Moreover, the side wall 22b facing the side wall 22a is provided with positioning holes 47 at positions facing each of the positioning holes 46 provided in the side wall 22a. Positioning rods 51 are inserted into these positioning holes 46, 47 when the upper column 21 and the lower column 22 are fixed.

[0023] Furthermore, the side wall 22a is provided with insertion holes 48 at multiple positions along the extension direction (z direction or -z direction in FIG. 2) of the lower column 22. The side wall 22b facing the side wall 22a is provided with multiple insertion holes 49 at positions coaxial with the insertion holes 48 provided in the side wall 22a. Here, the insertion holes 48, 49 correspond to a first hole portion recited in the claims.

[0024] For example, when fixing the upper column 21 and the lower column 22, a bolt 52 is inserted into each of the insertion holes 48 provided in the side wall 22a and the insertion holes 49 provided in the side wall 22b, that are located above the positioning holes 46, 47 through which the positioning rod 51 is inserted, and the insertion hole 49 that is coaxial with each of the two insertion holes 48. The insertion hole 48 provided in the side wall 22a and the insertion hole 49 provided in the side wall 22b have the same inner diameter.

[0025] When fixing the upper pillar 21 and the lower pillar 22 together, such as when adjusting the height of the rail 11 of the gate rail device 10, the positioning rod 51 is inserted through each of the positioning holes 46 and 47 provided in the side wall 22a and the side wall 22b of the lower pillar 22. When inserted through each of the positioning holes 46 and 47 in the side wall 22a and the side wall 22b, one end 51a of the positioning rod 51 in the central axis direction protrudes outward from the side wall 22a, and at the same time, the other end 51b of the positioning rod 51 in the central axis direction is held in a state of protruding outward from the side wall 22b (see, for example, FIG. 4). In this state, when the upper column 21 is lowered to insert the lower column 22 into the upper column 21, one end 51a of the positioning rod 51 enters the positioning recess 43 provided at the lower end of the side wall 21a of the upper column 21, and the other end 51b of the positioning rod 51 enters the positioning recess 44 provided at the lower end of the side wall 21b of the upper column 21. This prevents the upper column 21 from moving downward, and the upper column 21 is positioned relative to the lower column 22. In this state, the positioning rod 51 supports the upper column 21 from below. When the upper column 21 is supported from below by the positioning rod 51, the insertion hole 41 provided in the side wall 21a of the upper column 21 and the insertion hole 42 provided in the side wall 21b of the upper column 21 are coaxially held.

[0026] A bolt 52 and a nut 53 are used as a fixing means for fixing the upper column 21 and the lower column 22. When fixing the upper column 21 and the lower column 22, as described above, the upper column 21 is positioned relative to the lower column 22 by the positioning rod 51 attached to the lower column 22. The bolt 52 is inserted through the insertion hole 41 provided in the side wall 21a of the upper column 21, the insertion hole 48 provided in the side wall 22a of the lower column 22 and the insertion hole 49 provided in the side wall 22b, and the insertion hole 42 provided in the side wall 21b of the upper column 21, in this order. In this state, the nut 53 is screwed onto the threaded portion 52a of the bolt 52.

[0027] A washer 55 is disposed on the bolt 52 described above. The washer 55 is a member made of, for example, synthetic resin, synthetic rubber, or metal material. The washer 55 has a predetermined thickness so that when the nut 53 screwed onto the threaded portion 52a of the bolt 52 is tightened, the washer 55 enters the insertion hole 41 provided in the side wall 21a of the upper column 21 and receives the load of the upper column 21 together with the bolt 52 inserted into the insertion hole 42 of the side wall 22b. At the same time, the washer 55 abuts against the periphery of the insertion hole 48 in the side wall 22a of the lower column 22, thereby holding the lower column 22 in abutment against the inner surface of the upper column 21. Here, the outer diameter of the washer 55 is equal to or smaller than the inner diameter of the insertion hole 41 provided in the side wall 21a of the upper column 21 and exceeds the inner diameter of the insertion hole 48 provided in the side wall 22a of the lower column 22. For example, the outer shape of washer 55 is preferably about 2 to 4 times the diameter of the shaft of bolt 52. In addition, the maximum width of head 52b of bolt 52 is less than the inner diameter of insertion hole 41 in side wall 21a of upper pillar 21 and greater than the inner diameter of insertion hole 48 in lower pillar 22.

[0028] The nut 53 is, for example, a flanged nut. The nut 53 is fastened to the threaded portion 52a of the bolt 52 inserted between the upper column 21 and the lower column 22, thereby fixing the upper column 21 and the lower column 22. When the nut 53 is fastened, the nut 53 and the head 52b of the bolt 52 approach each other. As a result, the nut 53 rotates while sliding against the side wall 21b of the upper column 21, while the head 52b of the bolt 52 moves toward the nut 53. At this time, the washer 55 provided on the bolt 52 enters the insertion hole 41 of the side wall 21a of the upper column 21, and the washer 55 through which the bolt 52 is inserted is abutted against the periphery of the insertion hole 48 of the side wall 22a of the lower column 22. When the nut 53 is further tightened, the side wall 22b of the lower pillar 22 is strongly pressed against and abuts the inner surface of the side wall 21b of the upper pillar 21, and tightening of the nut 53 is stopped.

[0029] Next, a procedure for changing (adjusting) the height of the rail of the gate rail device 10 will be described. Note that when adjusting the height of the rail 11, the same work is performed on the support pillars 12 and 13, so only the work performed on the support pillar 12 will be described.

[0030] First, after the rail 11 is held by another crane device (not shown), two nuts 53 fixing the upper column 21 and the lower column 22 of the support column 12 are loosened. After each of the two nuts is loosened and removed from the bolt 52, the bolt 52 is pulled out from the support column 12. This operation is similarly performed for the support column 13. After this operation, the rail 11 is lifted by the other crane device described above. In accordance with the lifting of the rail 11, the upper column 21 of the support column 12 and the upper column 31 of the support column 13 held by the rail 11 are lifted. Meanwhile, the lower column 22 of the support column 12 and the lower column 32 of the support column 13 are each held by an operator. As a result, the upper column 21 of the support column 12 is pulled out from the lower column 22, and the upper column 31 of the support column 13 is pulled out from the lower column 32.

[0031] 3 and 4, when the upper column 21 of the support column 12 is pulled out from the lower column 22, a positioning rod 51 is inserted into a positioning hole 46 at a desired position and a positioning hole 47 coaxial with the positioning hole 46, among a plurality of positioning holes 46 provided in the side wall 22a of the lower column 22. When the positioning rod 51 is inserted into the positioning holes 46, 47 of the lower column 22, one end 51a of the positioning rod 51 inserted into these positioning holes 46, 47 protrudes from the side wall 22b, and the other end 51b of the positioning rod protrudes from the side wall 22a.

[0032] After the positioning rod 51 is inserted through the positioning holes 46, 47 of the lower column 22, the rail 11 suspended from another crane device (not shown) is lowered, and the upper column 21 and the lower column 22 fixed to the rail 11 are fitted together with the upper column 21 facing outward and the lower column 22 facing inward. As shown in Fig. 5, when the rail 11 is lowered, one end 51a of the positioning rod 51 protruding from the side wall 22b of the lower column 22 enters the positioning recess 44 of the side wall 21b of the upper column 21, and the other end 51b of the positioning rod 51 enters the positioning recess 43 of the side wall 21a of the upper column 21. This stops the descent of the suspended rail 11 and the upper column 21 of the support column 12 fixed to the rail 11, and the upper column 21 of the support column 12 is positioned by the positioning rod 51 attached to the lower column 22.

[0033] When the upper column 21 of the support column 12 is positioned by the positioning rod 51 attached to the lower column 22, the two insertion holes 41 provided in the side wall 21a of the upper column 21 and the two insertion holes 42 facing these two insertion holes 41 are held coaxially with the two insertion holes 48 provided in the side wall 22a of the lower column 22 inserted inside the upper column 21 and the two insertion holes 49 provided in the side wall 22b.

[0034] 5, after the upper column 21 is positioned on the lower column 22, the bolt 52 is inserted in the order of the insertion hole 41 provided in the side wall 21a of the upper column 21, the insertion hole 48 provided in the side wall 22a and the insertion hole 49 provided in the side wall 22b of the lower column 22, and the insertion hole 42 provided in the side wall 21a of the upper column 21. When the bolt 52 is inserted into these insertion holes, the threaded portion 52a located at the tip side of the bolt 52 protrudes from the insertion hole 42 provided in the side wall 21b of the upper column 21. The nut 53 is screwed onto the threaded portion 52a of the bolt 52, and then the nut 53 is tightened. When the nut 53 is tightened, the head 52b of the bolt 52 moves toward the nut 53 and enters the inside of the insertion hole 41 provided in the side wall 21a of the upper column 21, and the washer 55 abuts against the periphery of the insertion hole 48 in the side wall 22a of the lower column 22. When the nut 53 is tightened, the head 52b of the bolt 52 moving toward the nut 53 presses the washer 55 and presses the lower column 22 toward the inner surface of the side wall 21b of the upper column 21. Then, when the side wall 22b of the lower column 22 is strongly pressed against and abuts against the inner surface of the side wall 21b of the upper column 21, the tightening of the nut 53 is completed and the upper column 21 and the lower column 22 are fixed together (see FIG. 6). Before the upper column 21 and the lower column 22 are fixed together, the rail 11 is lifted slightly by another crane device, and the positioning rod 51 is removed from the lower column 22.

[0035] In this manner, in the embodiment described above, both ends 51a, 51b of the positioning rod 51 attached to the lower column 22 enter into the positioning recesses 43, 44 provided in the upper column 21, respectively, to position the upper column 21 relative to the lower column 22. When the upper column 21 is positioned relative to the lower column 22, the two insertion holes 41 provided in the side wall 21a of the upper column 21 and the two insertion holes 42 facing these two insertion holes 41 are held coaxially with the two insertion holes 48 provided in the side wall 22a of the lower column 22 inserted inside the upper column 21 and the two insertion holes 49 provided in the side wall 22b. This makes it easier to insert the bolt 52 for fixing these columns.

[0036] Also, a nut 53 is fastened to the bolt 52 inserted between the upper column 21 and the lower column 22. At this time, the washer 55 through which the bolt 52 is inserted enters the insertion hole 41 in the side wall 21a of the upper column 21 and presses the side wall 22a of the lower column 22. Therefore, when the upper column 21 and the lower column 22 are fixed, the side wall 22b of the lower column 22 is strongly pressed against and abuts against the inner surface of the side wall 21b of the upper column 21. As described above, the outer size of the lower column 22 is smaller than the size of the internal space of the upper column 21. Therefore, when the lower column 22 is inserted into the upper column 21, a gap is generated between the upper column 21 and the lower column 22. When the upper column 21 and the lower column 22 are fixed together, the washer 55 that fits into the insertion hole 41 of the lower column 22 fills the gap between the upper column 21 and the lower column 22, preventing the upper column 21 from shaking due to rattling.

[0037] In the above-described embodiment, the support pillar 12 (13) supporting the rail 11 of the gate rail device 10 is a support pillar of a nested telescopic structure with the upper pillar 21 (31) as an outer cylinder and the lower pillar 22 (32) as an inner cylinder. As a support pillar of a nested telescopic structure, for example, as shown in Figs. 7 and 8, the support pillar 62 (63) supporting the rail 61 of the gate rail device 60 may be a support pillar of a nested telescopic structure with the upper pillar 64 (66) as an inner cylinder and the lower pillar 65 (67) as an outer cylinder. Here, the upper pillar (66) corresponds to the first pillar part in the claims. The lower pillar 65 (67) corresponds to the second pillar part in the claims.

[0038] In the following, the same components as those described above will be denoted by the same reference numerals. Since the support columns 62 and 63 have the same configuration, only the configuration of the support column 62 will be described below, and the description of the support column 63 will be omitted.

[0039] For example, as shown in FIG. 8, of the upper column 64 and the lower column 65 constituting the support column 62, the upper column 64 is provided with positioning recesses 71, 72 at the other end (lower end in FIG. 8) opposite to the one end fixed to the rail 61 in the extension direction of the upper column 64. When the upper column 64 is inserted into the lower column 65, the positioning rod 51 inserted into the lower column 65 fits into the positioning recesses 71, 72. Furthermore, the upper column 64 is provided with insertion holes 73, 74 at a plurality of positions along the extension direction of the upper column 64. The insertion holes 73 and 74 are provided at positions that are coaxial with each other. The insertion holes 73, 74 correspond to the first hole portion recited in the claims.

[0040] Furthermore, the lower pillar 65 is provided with positioning holes 76 at a plurality of positions along the extension direction of the lower pillar 65. Furthermore, the lower pillar 65 is provided with a positioning hole 77 at a position coaxial with the positioning hole 76. The positioning rod 51 is inserted into any of the positioning holes 76, 77 provided at the plurality of positions.

[0041] The lower column 65 is provided with insertion holes 78 and 79. When the upper column 64 and the lower column 65 are fixed to each other, the bolt 52 is inserted into the insertion hole 78, and the washer 55 attached to the inserted bolt 52 is inserted into the insertion hole 78. The insertion hole 79 is provided at a position coaxial with the insertion hole 78, and the tip portion (threaded portion 52a) of the bolt 52 inserted into the insertion hole 78 is inserted into the insertion hole 79. Of the insertion holes 78 and 79, the inner diameter of the insertion hole 78 is larger than the inner diameter of the insertion hole 79. The insertion hole 78 corresponds to a third hole portion in the claims. The insertion hole 79 corresponds to a second hole portion in the claims.

[0042] In this case, for example, when adjusting the height of the rail 61, the positioning rod 51 is inserted into one of the positioning holes 76, 77 provided at a plurality of positions in the lower column 65. Then, when the upper column 64 is inserted into the inside of the lower column 65 from the upper end of the lower column 65, the positioning rod 51 inserted into the positioning holes 76, 77 of the lower column 65 enters the positioning recesses 71, 72 provided at the lower end of the upper column 64. This positions the upper column 64 relative to the lower column 65. When the upper column 64 is positioned relative to the lower column 65, the insertion holes 73, 74 provided in the upper column 64 and the insertion holes 78, 79 provided in the lower column 65 are held coaxially. Therefore, the bolt 52 is inserted into these insertion holes from the insertion hole 78 side, and the threaded portion 52a of the bolt 52 protrudes outward from the insertion hole 74 to the outside of the lower column 65. After the nut 53 is screwed onto the threaded portion 52a of the bolt 52, the nut 53 is tightened to fix the upper pillar 64 and the lower pillar 65 together. At this time, the washer 55 provided on the bolt 52 enters the insertion hole 78 and strongly presses the upper pillar 64 against the inner surface of the lower pillar 65. As described above, when the upper pillar 64 and the lower pillar 65 are fixed together, the washer 55 enters the insertion hole 78 of the lower pillar 65, but the load due to the weight of the upper pillar 64 is received by the bolt 52, not the washer 55.

[0043] In the present embodiment described above, the washer 55 through which the bolt 52 is inserted may be provided integrally with the bolt 52 or may be a separate body. The configuration of the washer 55 is not necessarily required. For example, instead of using the bolt 52 having the hexagonal columnar head 52b in the above embodiment, a bolt (e.g., a hexagonal socket head bolt) 81 having a cylindrical head 81b is used as shown in FIG. 9. In this case, the cylindrical head 81b has an outer diameter that is equal to or smaller than the inner diameter of the insertion hole 41 and exceeds the inner diameter of the insertion hole 48. When the upper column 21 and the lower column 22 are fixed using such a bolt 81 (the nut 53 screwed into the threaded portion 81a provided at the tip of the bolt 81 is tightened), the head 81b of the bolt 81 is inserted into the insertion hole 41 provided in the side wall 21a of the upper column 21 and abuts against the periphery of the insertion hole 48 of the lower column 22. When a bolt 81 having a cylindrical head 81b (for example, a hexagonal socket head bolt) is used, the head 81b of the bolt 81 can bear the load due to the weight of the upper column 21 itself.

[0044] In addition, although not shown in the figures, when the upper column 21 and the lower column 22 are fixed, a structure is used in which a washer 55 with a bolt 52 inserted therethrough is inserted into the insertion hole 41 in the side wall 21a of the upper column 21, and the washer 55 inserted into the insertion hole 41 supports the load due to the weight of the upper column 21. However, a structure may also be used in which the body (cylindrical portion) of the bolt 52 supports the load due to the weight of the upper column 21 without using the above-mentioned washer 55 configuration.

[0045] Although the insertion hole 41 has a circular cross section so as to be easily machined in the upper column 21, it may have a non-circular cross section. In that case, the cross-sectional shapes of the washer 55 and the body of the bolt 52 are also made to match the shape of the insertion hole 41.

[0046] In this embodiment, a gate rail device 10 is described in which each of the support pillars 12 and 13 has a nested telescopic structure so that the height of the rail 11 can be adjusted. Instead of adjusting the height of the rail 11, it is possible to use the support pillars 12 and 13 having a nested telescopic structure to hold the rail 11 horizontally, for example, when a gate rail device is installed across a floor surface having a step of a predetermined height. Therefore, for example, as shown in FIG. 10, a gate rail device 85 may be configured in which the support pillar 86 has a nested telescopic structure made up of an upper pillar 88 and a lower pillar 89. Also, although not shown, the support pillar 87 may be a support pillar having a nested telescopic structure made up of an upper pillar and a lower pillar instead of the support pillar 86.

[0047] In this embodiment, a gate rail device 10 having one rail is taken as an example, but as shown in Figure 11, it is also possible to make each of the four support pillars 93, 94, 95, and 96 used in a gate rail device 90 having two parallel rails 91, 92 into support pillars with a nested, telescopic structure.

[0048] (About the effect) The above-described portal rail device 10 is a height-adjustable portal rail device 10 having a traveling device 15 that lowers a hoist 16, a rail 11 that guides the movement of the traveling device 15, and a plurality of support pillars 12, 13 that support both ends of the rail 11 in the extension direction from below, and at least one of the plurality of support pillars 12, 13 has a cylindrical upper pillar 21 that fixes one end of itself in its extension direction to the rail 11, and a cylindrical lower pillar 22 that forms a nested telescopic structure between the upper pillar 21 and is provided at a plurality of positions in the extension direction of the lower pillar 22, and has a pair of positioning holes 46, 47 that penetrate the outer circumferential surface of the lower pillar 22, a positioning rod 51 that is inserted into one of the plurality of positioning holes 46, 47, and is provided at the other end of the upper pillar 21 in the extension direction, The upper column 21 has positioning recesses 43, 44 into which the positioning rod 51 inserted into the lower column 22 fits, and a bolt 52 and a nut 53 that fix the upper column 21 and the lower column 22. One of the upper column 21 or the lower column 22, which serves as the inner tube, has pairs of insertion holes 48, 49 at multiple positions along the extension direction of the column, and the other of the upper column 21 or the lower column 22, which serves as the outer tube, has an insertion hole 41 and an insertion hole 42 that is coaxial with the insertion hole 41. When the positioning rod 51 fits into the positioning recesses 43, 44, any one pair of the insertion holes 48, 49 provided at the multiple positions is located between the insertion holes 41, 42 and is held coaxially with the insertion holes 41, 42. The bolt 52 is inserted into each of the insertion holes 41, 48, 49 and the insertion hole 42 from the insertion hole 41 side and screwed into the nut 53.

[0049] Conventionally, gate-type rail devices had a fixed total length for the support posts, i.e., the height of the rail, so gate-type rail devices were provided using support posts of a length appropriate to the usage environment, with a specific length as the maximum length.

[0050] In contrast, in the gate rail device 10 of this embodiment, the support pillars 12, 13 are configured so that the overall length of the support pillars 12, 13 can be changed by the upper pillar 21 (31) and the lower pillar 22 (32) that is nested within the upper pillar 21 (31). In this way, by providing a gate rail device 10 that allows the height of the rail 11 to be adjusted according to the usage environment, the owner of the gate rail device 10 can adjust the height of the rail 11 when the usage environment changes.

[0051] Furthermore, when manufacturing the gate rail device 10 or when adjusting the height of the rail 11, the rail 11 and upper pillar 21 are lifted by another crane device, and then the upper pillar 21 is positioned relative to the lower pillar 22. This positioning work is a simple task of inserting the positioning rod 51 into the lower pillar 22 and lowering the upper pillar 21 until the positioning rod 51 provided on the lower pillar 22 fits into the positioning recesses 43, 44 provided on the upper pillar 21. This makes it possible to facilitate the alignment work.

[0052] In addition, when the upper column 21 is positioned relative to the lower column 22, the insertion holes 48, 49 among the multiple insertion holes 48, 49 provided in the lower column 22, which correspond to the positioning holes 46, 47 through which the positioning rod 51 is inserted, the insertion hole 41 provided in the upper column 21, and the insertion hole 42 provided in a position opposite the insertion hole 41 are held coaxially, so that the bolt 52 can be easily inserted and the work of fixing the upper column 21 and the lower column 22 can be performed efficiently.

[0053] In addition, the insertion holes 41, 42 are machined by an automatic machining device, and the positioning recess 44 is also formed as a semicircular recess so that it can be machined by the same automatic machining device. This makes it possible to easily and accurately form the insertion holes 41, 42 and the positioning recess 44.

[0054] In addition, the insertion hole 41 has an inner diameter larger than the inner diameter of the insertion hole 48, and the bolt 52 has a washer 55 having an outer diameter that exceeds the inner diameter of the insertion hole 48 and is equal to or smaller than the inner diameter of the insertion hole 41, and when the bolt 52 and nut 53 are fixed, the washer 55 enters the insertion hole 41 under the pressure of the head 52b of the bolt 52 adjacent to the nut 53 and abuts against the peripheral portion of the insertion hole 48, and when the bolt 52 and nut 53 are fixed, the head 52b of the bolt 52 adjacent to the nut 53 presses the washer 55, causing the innermost column of the upper column 21 and lower column 22, which form a nested telescopic structure, to abut against the inner surface of the outermost column.

[0055] According to this, when the upper column 21 and the lower column 22 are fixed together, the side wall 22b of the lower column 22 is strongly pressed against and comes into contact with the inner surface of the side wall 21b of the upper column 21. At this time, the washer 55 entering the insertion hole 41 of the lower column 22 fills the gap between the upper column 21 and the lower column 22, thereby preventing the upper column 21 from shaking due to rattling. [Explanation of symbols]

[0056] 10,60…Gate rail device 11,61…Rail 12,13,62,63…support pillar 16...Hoisting machine 21, 31, 64, 66...Upper column (first column section) 22, 32, 65, 67…Lower column (second column section) 41, 78...Through hole (third hole portion) 42, 79...Through hole (second hole portion) 43, 44, 71, 72... Positioning recess 46, 47, 76, 77...Positioning holes 48, 49, 73, 74...Through holes (first holes) 52…Bolt 53...Nut 55…Washer

Claims

[Claim 1] A traveling means for lowering the hoist; A rail for guiding the movement of the traveling means; A plurality of support columns supporting both ends of the rail in the extension direction from below; A height-adjustable gate rail device having At least one of the plurality of support columns is a cylindrical first pillar portion having one end portion in an extension direction fixed to the rail; A cylindrical second column portion that forms a nested telescopic structure between the first column portion and the cylindrical second column portion; having A pair of positioning holes are provided at a plurality of positions in the extension direction of the second column portion and penetrate an outer circumferential surface of the second column portion; a positioning rod to be inserted into any one of the positioning holes forming a plurality of pairs; a positioning recess provided at the other end of the first column in the extension direction and into which the positioning rod inserted into the second column is inserted; A bolt and a nut as a fixing means for fixing the first pillar portion and the second pillar portion; having One of the first column portion and the second column portion, which is an inner tube, has a pair of first hole portions at a plurality of positions along an extension direction of the column portion, The other of the first column portion and the second column portion, which is an outer cylinder, has a second hole portion and a third hole portion coaxial with the second hole portion, When the positioning rod is inserted into the positioning recess, any pair of the first holes provided at the plurality of positions is located between the second hole and the third hole and is held coaxially with the second hole and the third hole, The bolt is inserted through the third hole portion, the pair of first hole portions, and the second hole portion, which are coaxially held, in that order from the third hole portion side, and is screwed into the nut, The third hole has an inner diameter larger than an inner diameter of the first hole, a washer having an outer diameter larger than an inner diameter of the first hole portion and smaller than an inner diameter of the third hole portion is provided on the bolt; When the bolt and the nut are fixed to each other, the washer is pressed by the head of the bolt adjacent to the nut to enter the third hole portion and is brought into contact with the peripheral portion of the first hole portion, When the bolt and the nut are fixed, the head of the bolt adjacent to the nut presses the washer, so that the first column portion and the second column portion, which form the nested telescopic structure, are brought into contact with the inner surface of the outer column portion, The first column portion and the second column portion are square steel pipe members having a square outer peripheral shape in a cross section perpendicular to each extension direction, A gate-type rail device characterized by:

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