JP7365038B2 - slope device - Google Patents

Description

This invention is intended to be installed at a step in a passage surface where a transport vehicle such as a handcart or a cargo handling vehicle such as a forklift moves in various work sites, factory facilities, logistics facilities, etc. to eliminate the step. The present invention relates to a slope device used.

For example, it may be difficult for handcarts, forklifts, etc. to move over the steps on passageways that have differences in level, so this is to eliminate these steps so that handcarts, etc. can be moved without hindrance. Slope devices are conventionally used.

As a slope device, for example, one described in Patent Document 1 below is known. This slope device includes a frame-shaped main body disposed on the lower surface, a slope plate part provided with an adjustable inclination angle with respect to the main body part, and two left and right slopes that respectively support the left and right sides of the slope plate part. It includes a plate support mechanism and two left and right slope plate inclination holding mechanisms that suppress movement of each slope plate support mechanism and hold the slope plate part at a required inclination angle.
Each slope plate support mechanism includes a Scott Russell link mechanism, that is, a first link member whose one end is rotatably connected to the slope plate and whose other end moves horizontally in the front-rear direction along the main body; The second link member is rotatably connected to the main body portion, and the other end portion is rotatably connected to the first link member midway in the longitudinal direction.
In addition, each slope plate inclination holding mechanism has a box-like shape with a through hole extending in the front-rear direction, and a stopper part provided on the main body part, and a head side rotatably connected to the movable end part of the first link member, and a tip end thereof. The position adjustment guide part is made up of a bolt that is inserted into a through hole of the stopper part, and the stopper locking part is made of a nut screwed onto the bolt and is latched to the stopper part.
In the above slope device, by rotating the nuts (stopper locking portions) of the left and right slope plate inclination holding mechanisms by the required amount in the required rotation direction, the moving end of the first link member of each slope plate support mechanism is By changing the movable range of the slope plate part, the inclination angle of the slope plate part can be changed and adjusted to match the height of the step at the installation location.

Japanese Patent Application Publication No. 2005-207145

However, in the case of the above slope device, the inclination angle of the slope plate part is adjusted by rotating the nuts (stopper locking parts) of the two left and right slope plate inclination holding mechanisms. It took time and effort to adjust the position of the nut, and there were problems with operability.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a slope device that can easily adjust the inclination angle of a slope plate in a short time.

This invention consists of the following aspects in order to achieve the above object.

1) A slope device for eliminating the level difference that occurs between the upper level surface of the passage and the lower level side located behind it,
A base frame placed on the lower surface,
a variable slope plate whose rear end is rotatably connected to the base frame and whose upper surface forms a slope surface;
A support unit is provided between the base frame and the variable slope plate and supports the variable slope plate so as to freely adjust the inclination angle.
The support unit has a screw shaft that extends in the front-rear direction and is rotatably attached to the base frame around the axis, and a screw shaft that is screwed into the screw shaft and is moved in the front-rear direction as the screw shaft rotates. It has a feed nut, a support arm whose one end is rotatably connected to the feed nut and whose other end is rotatably connected to a variable slope plate, and a rotation operation part for rotating the screw shaft. A slope device.

2) The screw shaft is attached to the base frame so as to be located below the center of the left and right width of the variable slope plate,
The support arm includes a left support arm whose one end is rotatably connected to the left half of the feed nut and whose other end is rotatably connected to the left half of the variable slope plate; The slope device according to 1) above, comprising a right support arm rotatably connected to the right half of the nut and whose other end is rotatably connected to the right half of the variable slope plate.

3) The screw shaft is attached to the base frame so that its front end protrudes near the bottom of the front end of the variable slope plate,
The slope device according to 1) or 2) above, wherein the rotation operation section is provided at the front end of the screw shaft.

4) The support unit extends in the left-right direction, and its right end is interlockably connected to either the front or rear end of the screw shaft via a gear mechanism, and its left end is below the left edge of the variable slope plate. A left rotation shaft for power transmission that is rotatably attached to the base frame around its axis so as to protrude nearby, and/or a left rotation shaft for power transmission that extends in the left and right direction and whose left end is attached to either the front or rear end of the screw shaft. A right-handed transmission gear is connected to the base frame so that it can rotate through a gear mechanism, and is rotatably attached to the base frame so that its right end protrudes near the bottom of the right edge of the variable slope plate. It further has an axis,
The slope device according to 1) or 2) above, wherein the rotation operation section is provided at the left end of the left rotation shaft for transmission and/or the right end of the right rotation shaft for transmission.

5) The slope device according to any one of 1) to 4) above, wherein the rotary operation section comprises a rotary operation head connectable to an electric rotary tool.

6) The variable slope plate has a pair of left and right vertical frame members, and a plurality of upper plate members that span the left and right vertical frame members in a longitudinal direction and are fastened with bolts. A slope device according to any one of 1) to 5).

According to the slope device of 1) above, by rotating one screw shaft of the support unit in a desired direction and by a desired angle via the rotation operation section, the inclination angle of the variable slope plate is adjusted to the height of the step. Since the adjustment can be changed and adjusted as desired, the adjustment work can be done easily in a short time and has excellent operability.

According to the slope device described in 2) above, the variable slope plate can be stably supported by the two left and right support arms of the support unit, so there is no risk of rattling or shaking of the variable slope plate during use. .
Further, according to the slope device, the durability of the slope device can be improved while maintaining the operability when adjusting the inclination angle of the variable slope plate described above.
Furthermore, according to the slope device, since the structure of each support arm can be simplified, manufacturing becomes easy and costs can be reduced, and the necessary load-bearing strength can be easily obtained.

According to the slope device of 3) above, the rotation operation section of the support unit is provided at the front end of the screw shaft protruding near the lower front end of the variable slope plate, so that the operation for rotating the screw shaft can be performed. This can be easily done from the front of the slope device without having to insert your hand deep under the variable slope plate, resulting in excellent operability.

According to the slope device 4) above, since the rotation operation part of the support unit is provided at the end of the transmission rotating shaft protruding near the lower side edge of either the left or right side of the variable slope plate, The operation for rotating the screw shaft can be easily performed from the side of the slope device without inserting the hand deeply below the variable slope plate, and the operability is excellent.
In particular, this operation can be performed with the slope device placed so that the front end of the variable slope plate is close to the step, making it easier to adjust the inclination angle of the variable slope plate.

According to the slope device of 5) above, an electric rotary tool such as an impact driver is connected to the rotary operation section consisting of a rotary operation head, and the screw shaft is rotated by the electric rotary tool to adjust the inclination angle of the variable slope plate. Since the adjustment can be made, the adjustment work can be done easily and in a very short time.

According to the slope device in 6) above, the variable slope plate is formed by connecting the left and right vertical frame members and a plurality of upper plate members with bolts, so even if some of the upper plate members are damaged due to use, for example, , it is possible to easily replace only the upper plate material, which is economical.

1 is a perspective view showing the overall configuration of a slope device according to a first embodiment of the present invention. It is a left side view of the same slope device. It is a top view of the same slope device. It is a front view of the same slope device. It is a top view which shows the base frame and support unit (excluding left and right support arms) of the slope apparatus. It is a left side view which shows the same support unit exploded. It is a left side view showing the folded state of the same slope device. It is a left side view of the slope device concerning the 2nd embodiment of this invention. It is a front view of the same slope device. It is a top view which shows the base frame and support unit (excluding left and right support arms) of the slope apparatus.

Next, embodiments of the present invention will be described with reference to FIGS. 1 to 10.
In addition, in the following explanation, each right side of Figures 2 and 8 is referred to as "front", the same left side is referred to as "rear", and "left and right" refers to the left and right when viewed from the front (each left and right in Figures 4 and 9). shall be.

[First embodiment]
1 to 7 show a slope device according to a first embodiment of the present invention.
As shown in the overall configuration in FIGS. 1 to 4, the slope device (1) according to this embodiment has a step difference ( G3), the base frame (2) is arranged on the lower surface (G2), the rear end is rotatably connected to the base frame (2), and the upper surface is a slope surface ( 30), and a support unit that is provided between the base frame (2) and the variable slope plate (3) and supports the variable slope plate (3) in a freely adjustable inclination angle. (4).
Further, the slope device (1) includes a fixed slope plate (5) whose front end is rotatably connected to the base frame (2) and arranged on the lower surface (G2). The upper surface of the fixed slope plate (5) constitutes a slope surface (50) that is continuous with the rear end of the slope surface (30) of the variable slope plate (3).

As shown in FIG. 5, the base frame (2) has a substantially rectangular frame shape when viewed from above. More specifically, the base frame (2) has two vertical frame members (21) on the left and right, and a space between the front ends, rear ends, and intermediate lengths of both vertical frame members (21). It has three horizontal frame members (22A), (22B), and (22C) at the front, rear, and middle that are stopped.
Each of the left and right vertical frame members (21) has an L-shaped cross section, and has a horizontal wall portion (211) and a vertical wall portion (212) extending upward from the outer edge of the horizontal wall portion (211) in the left and right direction. A drain hole (211a) is formed in the horizontal wall portion (211) as necessary. The rear horizontal frame member (22C) also has an L-shaped cross section, including a horizontal wall portion (221) and a vertical wall portion (222) extending upward from the rear edge of the horizontal wall portion (221). The front horizontal frame material (22A) and the intermediate horizontal frame material (22B) function as attachment parts for attaching the screw shaft (41) of the support unit (4), which will be described later, and each have a substantially rectangular cross section. It is hollow (see also Figures 2, 6, etc.). As shown in FIGS. 5 and 6, a reinforcing core material (23) having a substantially rectangular cross section may be fitted inside the intermediate horizontal frame material (22B).
Between the lower surfaces of the front horizontal frame material (22A) and the intermediate horizontal frame material (22B), a bottom plate material (25) having a substantially rectangular shape when viewed from above is fixed. On the left and right side edges of the bottom plate material (25), there are rising edges ( 251) is formed. In addition, one or a plurality of parallel protrusions (252) extending in the front-rear direction are formed at the middle portion of the upper surface of the bottom plate material (25), excluding the front and rear end portions. This bottom plate material (25) functions as a slide base portion for sliding a feed nut (42) of a support unit (4), which will be described later. A drainage hole (253) is formed in the bottom plate material (25) as necessary.
Furthermore, as shown in FIG. A total of four diagonal frame members (24) may be provided, and the strength of the base frame (2) is further increased by these diagonal frame members (24).
The vertical frame material (21), horizontal frame material (22A) (22B) (22C), reinforcing core material (23), and diagonal frame material (24) that constitute the base frame (2) are each made of light metal material. More preferably, it is made of an aluminum alloy material (particularly an aluminum alloy extruded shape material), which is lightweight, strong, and has excellent workability and corrosion resistance.
Joining of two vertical frame members (21) and three horizontal frame members (22A) (22B) (22C), and joining of intermediate horizontal frame members (22B) and multiple diagonal frame members (24) This is usually done by welding, but other joining means (eg bolted, riveted, etc.) may also be used.

The variable slope plate (3) has a substantially rectangular shape when viewed from above, as shown in FIG. More specifically, the variable slope plate (3) includes a pair of left and right vertical frame members (31), and a plurality of (here It has five top plate materials (32A), (32B), and (32C).
It is preferable that the vertical frame material (31) and the top plate material (32A), (32B), and (32C) constituting the variable slope plate (3) are each made of a light metal material, and more preferably, it is lightweight and strong. It is made of an aluminum alloy material (particularly an aluminum alloy extruded shape) that has excellent workability and corrosion resistance.
It is preferable that each of the top plate members (32A), (32B), and (32C) be fastened and fixed to the left and right vertical frame members (31) by bolts (33). The upper surface of the upper plate materials (32A), (32B), and (32C) constitutes a slope surface (30) for running a transport vehicle, etc., and with the use of the slope device (1), some It is also possible that the top plate materials (32A), (32B), and (32C) are damaged by the impact. Therefore, if the top plate materials (32A), (32B, and 32C) are connected to the left and right vertical frame members (31) by fastening bolts (33) as described above, some of the damaged top plate materials The slope device (1) can be used continuously by simply replacing 32A), 32B, and 32C, which is economical.
However, the configuration of the variable slope plate is not limited to the above embodiment. Specifically, for example, the variable slope plate may include a pair of left and right vertical frame members, and a single upper plate member whose left and right side edges are welded to the left and right vertical frame members, This configuration is advantageous in terms of productivity.

Each vertical frame member (31) has an outer vertical wall (311), an inner vertical wall (312), an outer vertical wall (311) and an inner vertical wall ( 312) and an upper wall portion (313) that connects the upper edges thereof, and has a substantially inverted U-shape in cross section. The vertical frame material (31) also includes an outer overhanging wall (314) that extends outward in the left-right direction from the lower edge of the outer vertical wall (311) and a lower edge of the inner vertical wall (312). an inner overhanging wall (315) that overhangs inward in the left-right direction, and an intermediate partition wall (316) that extends parallel to the upper wall (313) so as to divide the interior of the vertical frame material (31) into vertical sections. It may further have the following. The vertical width of the outer vertical wall (311) is larger than the vertical width of the inner vertical wall (312). The front edges of the outer vertical wall (311) and the inner vertical wall (312) are inclined so as to extend diagonally rearward downward. The rear part of the lower edge of the outer vertical wall (311) is inclined diagonally upward so that the vertical width of the outer vertical wall (311) gradually narrows toward the rear. Bolt insertion holes (not shown) are formed in the outer vertical wall portion (311) and the inner vertical wall portion (312) at a plurality of required locations spaced apart in the front-rear direction.

In addition, in order to increase the load-bearing strength of the variable slope plate (3), as shown in Fig. A total of 4 pieces of horizontal frame material (34A) (34B) may be held together. The cross-sectional shape of the horizontal frame material may be appropriately set depending on the configuration of the arrangement location, etc. In this embodiment, the horizontal frame material (34A) located at the front end has a substantially U-shaped cross section, and the left and right ends of the lower surface of the horizontal frame material (34A) are attached to the left and right sides of the support unit (4), which will be described later. An inverted U-shaped arm connecting bracket (341) for rotatably attaching the upper ends of the support arms (43A) (43B) is connected and fixed (see FIGS. 2 and 4). The remaining horizontal frame member (34B) is, for example, hollow with a substantially rectangular cross section.

In this embodiment, the top plate includes three types of top plate materials (32A), (32B), and (32C), namely, the first top plate (32A) disposed at the front end of the variable slope plate (3), and the variable slope plate. It is constituted by three second upper plate members (32B) arranged at the middle of the length of (3) and a third upper plate member (32C) arranged at the rear end of the variable slope plate (3). However, the configuration of the top plate material is not limited to this.
The first upper plate (32A) is hollow with a substantially square cross section, and is the narrowest among the three types. A flange (321) is formed on the front edge of the first upper plate (32A) to be hung on the rear edge of the upper surface (G1) of the passage. The flange (321) is set at a predetermined position with respect to the upper surface of the first upper plate (32A) so that the variable slope plate (3) is approximately horizontal when the angle of inclination of the variable slope plate (3) is at its maximum (for example, about 15°). It is bent diagonally downward to form an angle (for example, about 15°) (see Figure 2).
The second upper plate material (32B) has an approximately E-shaped cross section and has an upper wall portion and three hanging wall portions extending downward from the front and rear edges and the center of the front and rear width of the upper wall portion. . At the lower end edge of each hanging wall portion, a leg portion is formed that protrudes short in the front-rear direction.
The third upper plate (32C) is flat and hollow with a substantially rectangular cross section, and the rear side portion is tapered by tilting the lower wall portion diagonally upward toward the rear. There is.
As shown in Fig. 2, internally threaded members (35) into which bolts (33) are screwed are arranged in both left and right ends of each top plate material (32A), (32B), and (32C), and are joined by rivets (not shown) or the like. Fixed.
A plurality of anti-slip protrusions and/or grooves extending in the left-right direction are formed in line in the front-rear direction on the upper surface of each of the upper-surface plates (32A), (32B), and (32C).

The rear end of the variable slope plate (3) is rotatably connected to the rear end of the base frame (2) about a rotation shaft extending in the left-right direction. More specifically, the rear end portions of the outer vertical wall portion (311) and the inner vertical wall portion (312) of the left and right vertical frame members (31) of the variable slope plate (3) are connected to the left and right sides of the base frame (2). It is rotatably connected to the upper rear end of the vertical wall portion (212) of the vertical frame member (21) by a bolt (36) and a nut (37).

Approximately U when viewed from the plane is located on the outer surface of the central length of the vertical wall portion ( 311) of the vertical frame material ( 31) on either the left or right side of the variable slope plate (3) (in this case, the left vertical frame material ( 31) ). A shaped handle (6) is attached with screws, etc.
In addition, the handle (6) may be attached to both the left and right vertical frame members (31) , and the handle (6) may be attached to the vertical wall portion of either or both of the left and right vertical frame members (21) of the base frame (2). (212) May be attached to the outside surface.

The fixed slope plate (5) has a substantially rectangular shape when viewed from above, as shown in FIG. The upper surface of the fixed slope plate (5) is a slope surface (approximately 15° in the figure) inclined at a predetermined angle (approximately 15 degrees in the figure) so as to connect the lower surface (G2) and the slope surface (30) of the variable slope plate (3). 50). Note that the fixed slope plate (5) may be omitted, for example, when the size of the slope device is small.
More specifically, the fixed slope plate (5) includes a pair of left and right vertical frame members (51), and a plurality of fixed slope plates (here It has three top plate materials (52A), (52B), and (52C).
It is preferable that the vertical frame material (51) and the top plate material (52A), (52B), and (52C) constituting the fixed slope plate (5) are each made of a light metal material, and more preferably, a light metal material that is lightweight and strong. It is made of an aluminum alloy material (particularly an aluminum alloy extruded shape) that has excellent workability and corrosion resistance.
It is preferable that each of the upper surface plates (52A), (52B, and 52C) is fastened and fixed to the left and right vertical frame members (51) with bolts (53), similarly to the variable slope plate (3). However, as in the case of a variable slope plate, a fixed slope plate comprising, for example, a pair of left and right vertical frame members and a single top plate whose left and right side edges are welded to the left and right vertical frame members. It is also possible to do this.
As shown in FIG. 2, each vertical frame member (51) is in the form of a vertical plate that is approximately triangular and long from front to back when viewed from the side. A connecting convex portion (511) protruding forward is formed at the lower front end of each vertical frame member (51). An inner overhanging wall section (512) is formed in the middle of the length of each vertical frame material (51) and extends in parallel with the upper edge of each vertical frame material (51) and extends inward in the left-right direction. There is. Each vertical frame member (51) is provided with bolt insertion holes (not shown) at a plurality of required locations spaced apart in the front-rear direction.
It is preferable that a plurality of (here, two in total) horizontal frame members (54) are secured between the left and right vertical frame members (51) at intervals in the front-rear direction. The horizontal frame member (54) has, for example, a hollow shape with a substantially rectangular cross section.
Magnets (56) are attached to the front side of the front horizontal frame member (54) at both left and right ends thereof.
The top plate includes a first top plate (52A) that is placed at the front end of the fixed slope plate (5) and has a flange (521) on the front edge, and a second top plate (52A) that is placed at the middle of the length of the fixed slope plate (5). It is composed of a top plate (52B) and a third top plate (52C) arranged at the rear end of the fixed slope plate (5). In this embodiment, the first to third upper surface plates (52A) (52B) (52C) of these fixed slope plates (5) are the first to third upper surface plates (32A) (32B) of the variable slope plate (3). )(32C) and have the same shape and structure, which reduces the number of component parts and reduces costs. However, it is of course possible that the upper plate material of the fixed slope plate (5) has a shape and structure different from that of the upper plate material of the variable slope plate (3). In addition, a drain hole (522) may be opened in the third upper plate material (52C) as necessary. In addition, similarly to the variable slope plate (3), internally threaded members (55) into which bolts (53) are screwed are arranged in both left and right ends of each top plate (52A) (52B) (52C), and rivets (not shown) (omitted) etc. are bonded and fixed.

The front end of the fixed slope plate (5) is rotatably connected to the rear end of the base frame (2) about a rotation axis extending in the left-right direction. More specifically, the connecting convex portions (511) of the left and right vertical frame members (51) on the fixed slope plate (5) connect with the vertical wall portions (212) on the left and right vertical frame members (21) of the base frame (2). is rotatably connected to the lower rear end of ) by a bolt (57) and a nut (58).

The support unit (4) has a screw shaft (41) that extends in the front-rear direction and is rotatably attached to the base frame (2) around its axis, and a screw shaft (41) that is screwed into the screw shaft (41). A feed nut (42) is moved in the front and back direction as the shaft (41) rotates, and one end is rotatably connected to the feed nut (42) and the other end is rotated to the variable slope plate (3). It has support arms (43A) (43B) that are movably connected and a rotation operation part (44) for rotating the screw shaft (41).

The screw shaft (41) is made of a metal rod-shaped body with a male thread of a desired shape (for example, a trapezoidal thread, etc.) formed on its surface.
This screw shaft (41) is attached to the base frame (2) so as to be located below the center of the left and right width of the variable slope plate (3). More specifically, the screw shaft (41) is rotatably attached across the length center of the front horizontal frame member (22A) and the intermediate horizontal frame member (22B) of the base frame (2).
The rear end portion of the screw shaft (41) consists of a small diameter shaft portion (411) in which no male thread is formed. The intermediate horizontal frame material (22B) and the reinforcing core material (23) fitted therein are provided with insertion holes (223) and (231) at the center of the left and right lengths of their front walls. In addition, at the center of the length of the front wall surface of the intermediate horizontal frame material (22B), a reinforcing plate (26) having an insertion hole (261) that matches the insertion holes (223) and (231) is attached with screws or the like. The joint is fixed. The small diameter shaft portion (411) of the screw shaft (41) is rotatably inserted into these insertion holes (223), (231), and (261) via the washer (412).
A through hole is drilled in the center of the length of the front and rear walls of the front horizontal frame material (22A), and a screw shaft insertion collar (27) extending in the front and back direction is fitted so as to span these through holes. ing. In addition, a reinforcing plate (28) having a through hole (281) that matches the rear end opening of the collar (27) is attached at the center of the length of the rear surface of the rear wall of the front horizontal frame material (22A) using screws or the like. The joint is fixed.
The screw shaft (41) is inserted from the front into the through hole (281) of the collar (27) and the reinforcing plate (28), and as described above, the small diameter shaft portion (411) at the rear end is inserted into the intermediate horizontal frame member. (22B) is inserted into the insertion holes (223), (231), and (261) of the reinforcing core material (23) and reinforcing plate (26). In this state, the front end of the screw shaft (41) protrudes forward from the front horizontal frame member (22A) and is located near the lower front end of the variable slope plate (3) (see Figure 2). .
In addition, a horizontal cylindrical stopper (413) is fitted over the screw shaft (41) near its front end, and both (41) and (413) have a spring pin or the like passing through them in the radial direction. They are joined together by a connecting pin (414). This stopper (413) has the function of preventing the screw shaft (41) from moving forward and falling off the base frame (2), and also has the function of regulating the forward movement range of the feed nut (42). have.
A bolt (415) is passed through the front end of the screw shaft (41) in the radial direction, and a nut (416) is screwed into the tip of the bolt (415). These bolts (415) and nuts (416) can be used, for example, when the screw shaft (41) It functions as a finger rest part (auxiliary rotation operation part) for manually rotating the.

For example, as shown in the figure, the feed nut (42) is made of a metal block with a substantially rectangular cross section that is long in the left and right direction, and has a male screw of the screw shaft (41) and a screw in the center of its length. A threaded hole (421) is drilled with a mating internal thread (eg trapezoidal thread).
The feed nut (42) constitutes a feed screw together with the screw shaft (41), and is adapted to be moved in the front-rear direction as the screw shaft (41) rotates. The feed nut (42) is configured to be able to slide on the top surface of the bottom plate material (25), more specifically, on the plurality of protrusions (252) formed on the top surface, when moving in the front-back direction. .
A substantially U-shaped arm connecting bracket (422) that opens forward when viewed from above is fixedly connected to both left and right ends of the feed nut (42).

Note that the feed screw mechanism consisting of a screw shaft and a feed nut is not limited to the above embodiment, and it is also possible to apply other types, such as a ball screw mechanism.

The support arm of this embodiment has one end rotatably connected to the left half of the feed nut (42) and the other end rotatably connected to the left half of the variable slope plate (3). The left support arm (43A) has one end rotatably connected to the right half of the feed nut (42) and the other end rotatably connected to the right half of the variable slope plate (3). It consists of the right support arm (43B).
As shown in FIG. 4, each of the left and right support arms (43A) (43B) has a vertical lower end arm section (431) and an upper end arm section (432), respectively, and a structure that connects these (431) and (432). It is made of a substantially crank-shaped metal cylindrical body having an intermediate arm portion (433) extending obliquely upward and outward in the left-right direction.
The lower end arm portion (431) is rotatably attached to arm connection brackets (422) provided on the left and right sides of the feed nut (42) by connection bolts (434). The upper end arm part (432) is connected to the arm connecting bracket (432) provided at each left and right end of the horizontal frame member (34A) at the front end of the variable slope plate (3) by means of a connecting bolt (435) and a nut (436). 341) is rotatably attached. The lower ends of the left and right support arms (43A) and (43B) are attached to the end surfaces of the left and right halves of the feed nut (42) as shown in the figure, as well as to the upper surfaces of the left and right halves of the feed nut (42). It may also be attached to the front or the like. Furthermore, the mounting positions of the upper ends of the left and right support arms (43A) and (43B) on the left and right halves of the variable slope plate (3) are not limited to those shown, but may be located inside or outside of the same positions. It is also possible to do this.
By moving the feed nut (42) in the front-back direction with the rotation of the screw shaft (41), the inclination angle of the left and right support arms (43A) (43B) is changed, thereby changing the inclination of the variable slope plate (3). The angle is now changed.
In addition, the support arm is constituted by two left and right support arms (43A) (43B) as in the above embodiment, and the upper end side connected to the variable slope plate (3) is branched into two or three or more. It may consist of a single support arm, or it may consist of three or more support arms.
In addition, as another embodiment, a plurality of feed nuts are screwed onto the screw shaft, and the lower end of one or more support arms is rotatably connected to each feed nut, so that the upper end of each support arm is variable. It may also be configured to be rotatably connected to a required location on the slope plate.

The rotation operation section (44) is provided at the front end of the screw shaft (41) that protrudes near the lower front end of the variable slope plate (3).
The rotary operation section preferably includes a rotary operation head (44) connectable to an electric rotary tool (D) such as an impact driver. More specifically, the rotary operation head (44) is constituted by, for example, a hexagonal nut (nominal diameter M10) attached to the front end of the screw shaft (41). According to the above configuration, the rotation operation of the screw shaft (41) for adjusting the inclination angle of the variable slope plate (3) can be performed extremely easily and in a short time using the electric rotary tool (D). can.

Next, an example of the installation procedure of the slope device (1) will be explained.
First, the base frame (2) and fixed slope plate (5) of the slope device (1) are placed on the lower surface (G2) of the passage.
Next, the vertical distance between the front end of the variable slope plate (3), that is, the flange (321) of the first upper plate (32A) and the lower surface (G2) is approximately the height of the step (G3). Adjust the inclination angle of the variable slope plate (3) so that they are equal. Specifically, the tip of the electric rotary tool (D) is connected to the rotation operation head (44) of the support unit (4) so that the screw shaft (41) rotates by the required amount in the required rotation direction. , drive the electric rotary tool (D). Then, as the screw shaft (41) rotates, the feed nut (42) moves the required distance in either the front or back direction, thereby changing and adjusting the inclination angle of the left and right support arms (43A) (43B). In turn, the variable slope plate (3) is tilted to the required angle.
Finally, by adjusting the position of the slope device (1) so that the flange (321) of the variable slope plate (3) is hung on the rear edge of the upper surface (G1), the slope device ( Installation of step 1) is completed. In this way, the upper surfaces of the variable slope plate (3) and the fixed slope plate (5) form slope surfaces (30) and (50) that can eliminate the level difference (G3) between the upper surface (G1) and the lower surface (G2). be done.

As described above, according to the slope device (1) of this embodiment, by simply rotating one screw shaft (41), the inclination angle of the variable slope plate (3) can be adjusted to the height of the step (G3) at the installation location. In addition to being able to adjust the rotation to suit the height of the variable slope plate (3), the screw shaft (41) can be rotated from the front of the slope device (1) without having to insert your hand deeply under the variable slope plate (3). This can be done extremely easily and in a short time using the electric rotary tool (D) connected to the rotary operation head (44) at the front end, so the effort and time required for the operation are significantly reduced.

FIG. 7 shows the slope device (1) in a folded state.
The illustrated slope device (1) is constructed by inverting the fixed slope plate (5) from the installation state shown in Figures 1 to 4 so that it overlaps the bottom surface of the base frame (2), and (41) is rotated so that the angle of inclination of the variable slope plate (3) becomes the minimum (approximately 0° with respect to the horizontal plane in the figure).
The slope device (1) in the folded state is much smaller in overall length and height than in the installed state and has a compact form, so it is easy to transport and requires less storage space.
In particular, when the base frame (2), variable slope plate (3), and fixed slope plate (5) are made of aluminum alloy, the slope device ( Since the overall weight of 1) is significantly reduced, for example, it becomes possible for a worker to carry the slope device (1) while holding the handle (6), thereby significantly improving the ease of handling.
In addition, in the case of the slope device (1) of this embodiment, in the folded state, the left and right magnets (56) provided on the back side of the fixed slope plate (5) are attached to the rear end of the bottom surface of the base frame (2). A magnetic attachment part (29) made of a magnetic material such as steel is provided, more specifically, for example, a steel screw (29) screwed to the rear end of the horizontal wall part (211) of each of the left and right vertical frame members (21). ) (see FIG. 5, etc.) are magnetically attached. Therefore, when transporting the slope device (1), for example, the fixed slope plate (5) is prevented from swinging unintentionally, and the transport work can be carried out without any trouble.

[Second embodiment]
8 to 10 show a slope device according to a second embodiment of the invention.
The slope device (1X) of this embodiment has substantially the same configuration as the slope device (1) of the first embodiment shown in FIGS. 1 to 7, except for the following points. This device has substantially the same effect as device (1).
That is, in the slope device (1X) of the second embodiment, the support unit (4X) further includes a left rotation shaft (45) for transmission. The left rotating shaft for transmission (45) is made of a metal rod-shaped body extending in the left-right direction, and its right end is attached to a gear mechanism (417) at either the front or rear end (the front end in the figure) of the screw shaft (41). (451), and is rotatably connected to the base frame (2) so that its left end protrudes near the bottom of the left edge of the variable slope plate (3). installed. A rotation operation section (44) is provided at the left end of the left rotation shaft for transmission (45).
Although not shown, in place of or in addition to the left rotation shaft for power transmission (45), it extends in the left-right direction, and the left end is located either before or after the screw shaft (41). It is interlockably connected to one end via a gear mechanism, and is attached to the base frame (2) about the axis so that the right end protrudes near the bottom of the right edge of the variable slope plate (3). A right rotation shaft for transmission that is rotatably attached may be provided, and a rotation operation portion may be provided at the left end of the right rotation shaft for transmission. In particular, when both the left rotation shaft for transmission (45) and the right rotation shaft for transmission are provided, the operator can rotate the screw shaft (41) from the desired direction depending on the installation environment of the slope device (1X), etc. Rotation operations can be performed, further improving convenience.

The front horizontal frame member (22X) of the base frame (2) has an L-shaped cross section and has a horizontal wall portion (224) and a vertical wall portion (225) extending upward from the rear edge of the horizontal wall portion (224). It is something.
The upper surface of the horizontal wall (224) has an insertion hole (not shown) at a required position in the length direction (a position slightly shifted to the left from the center of the length in the figure) into which the left rotation shaft (45) for transmission is inserted. A vertical retaining wall (226) is formed.
An insertion hole (not shown) through which the screw shaft (41) is inserted is formed at the center of the length of the vertical wall portion (225).

The front end of the screw shaft (41) projects forward from the vertical wall (225). A first bevel gear (417) is provided at the front end of the screw shaft (41) as a component of the gear mechanism.

A second bevel gear (417) that meshes with the first bevel gear (417) is attached to one end (right end) of the left rotation shaft (45) for transmission that protrudes inward in the left-right direction from the holding wall (226). 451) is provided.
The left side portion of the left rotation shaft (45) for transmission is inserted into an insertion hole (not shown) formed in the front end of the vertical wall (212) of the left vertical frame member (21) in the base frame (2). There is. With the above configuration, the left end of the left rotation shaft for power transmission (45) is made to protrude near the bottom of the left edge of the variable slope plate (3).
Further, the transmission left rotation shaft (45) is provided with a spring retaining collar (452) made of an E-ring or the like at a predetermined location adjacent to the left side surface of the retaining wall (226). A spring (46) is inserted between the collar (452) and the vertical wall (212) of the left vertical frame member (21). The left rotation shaft for transmission (45) is biased toward the right by the spring elastic force (biasing force) of the spring (46), so that the second bevel gear (451) and the first bevel gear (417) ) is maintained. Furthermore, since the spring retaining collar (452) is brought into contact with the left side surface of the retaining wall (226), the biasing force of the spring (46) is applied to the second bevel gear (451) and the first bevel gear (417). ) is regulated so as not to add more than necessary. Therefore, according to the above configuration, the rotational force of the left rotation shaft for transmission (45) is reliably transmitted to the screw shaft (41) via the second bevel gear (451) and the first bevel gear (417). Therefore, the threaded shaft (41) can be reliably and smoothly rotated by interlocking with the left rotation shaft for transmission (45).

Similar to the first embodiment, the rotary operation unit provided at the left end of the left rotation shaft for transmission (45) has a rotary operation head (44) (for example) connectable to an electric rotating tool (D) such as an impact driver. It is preferable to use a hexagonal nut with a nominal diameter of M10.
Further, a bolt (415) is passed through the left end of the left rotation shaft (45) in the radial direction, and a nut (416) is screwed into the tip of the bolt (415). . These bolts (415) and nuts (416) can function as a finger hook (auxiliary rotation operation unit) for manually rotating the left transmission rotation shaft (45) and the screw shaft (41) linked thereto. It is something.

According to the slope device (1X) of this embodiment, the rotation operation of the screw shaft (41) for adjusting the inclination angle of the variable slope plate (3) can be performed by inserting the hand deeply below the variable slope plate (3). This can be done very easily using the electric rotary tool (D) from the side of the slope device (1X) without any twisting, and it has excellent operability. In particular, this operation is performed with the slope device (1X) placed so that the front end of the variable slope plate (3), that is, the flange (321) of the first upper plate (32A), is close to the step (G3). Therefore, the work of adjusting the inclination angle of the variable slope plate (3) becomes even easier.

Although not shown in the drawings, a plurality of slope devices (1) (1X) of each of the above embodiments may be installed side by side in the left-right direction, thereby allowing a cargo handling vehicle such as a forklift to move over the step (G3). It becomes possible to form a wide slope surface for climbing over.

The present invention provides a slope that is installed at a level difference in a passageway where transport carts, cargo handling vehicles, etc. move, at various work sites, factory facilities, logistics facilities, etc., and forms a slope surface to eliminate the level difference. It can be suitably used as a device.

(1)(1X): Slope device
(2): Base frame
(3): Variable slope plate
(30): Slope surface
(31): Vertical frame material
(32A)(32B)(32C): Top plate material
(33)：Bolt
(4)(4X): Support unit
(41): Screw shaft
(417): 1st bevel gear (gear mechanism)
(42): Feed nut
(43A): Left support arm
(43B): Right support arm
(44): Rotary operation head (rotary operation section)
(45): Left rotation shaft for transmission
(451): 2nd bevel gear (gear mechanism)
(5): Fixed slope plate
(50): Slope surface
(D): Electric rotary tool
(G1): Upper surface
(G2): Lower side
(G3): Step

Claims (6)

A slope device for eliminating a step difference occurring between an upper level surface of a passageway and a lower level side located behind it,
A base frame placed on the lower surface,
a variable slope plate whose rear end is rotatably connected to the base frame and whose upper surface forms a slope surface;
A support unit is provided between the base frame and the variable slope plate and supports the variable slope plate so as to freely adjust the inclination angle.
The support unit has a screw shaft that extends in the front-rear direction and is rotatably attached to the base frame around the axis, and a screw shaft that is screwed into the screw shaft and is moved in the front-rear direction as the screw shaft rotates. It has a feed nut, a support arm whose one end is rotatably connected to the feed nut and whose other end is rotatably connected to a variable slope plate, and a rotation operation part for rotating the screw shaft. A slope device. The screw shaft is attached to the base frame so as to be located below the center of the left and right width of the variable slope plate.
The support arm includes a left support arm whose one end is rotatably connected to the left half of the feed nut and whose other end is rotatably connected to the left half of the variable slope plate; The slope device according to claim 1, further comprising a right support arm rotatably connected to the right half of the nut and having the other end rotatably connected to the right half of the variable slope plate. . The screw shaft is attached to the base frame so that its front end protrudes near the bottom of the front end of the variable slope plate,
The slope device according to claim 1 or 2, wherein the rotation operation section is provided at the front end of the screw shaft. The support unit extends in the left-right direction, and its right end is interlockably connected to either the front or rear end of the screw shaft via a gear mechanism, and its left end is connected near the bottom of the left edge of the variable slope plate. A left rotation shaft for transmission is attached to the base frame so as to be rotatable around the axis so as to protrude, and/or a gear mechanism extends in the left and right direction and the left end is attached to either the front or rear end of the screw shaft. A right-hand rotation shaft for power transmission is attached to the base frame so as to be rotatably connected to the base frame about its axis, and the right end protrudes near the lower right edge of the variable slope plate. Furthermore, it has
The slope device according to claim 1 or 2, wherein the rotation operation section is provided at the left end of the left rotation shaft for transmission and/or the right end of the right rotation shaft for transmission. The slope device according to any one of claims 1 to 4, wherein the rotational operation section comprises a rotational operation head connectable to an electric rotating tool. Claim 1: The variable slope plate includes a pair of left and right vertical frame members, and a plurality of upper plate members that span the left and right vertical frame members in a longitudinal direction and are fastened with bolts. 5. The slope device according to any one of 5 to 5.

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