JP2007056491A - Turntable and its slip preventing repair method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a turntable effectively suppressing a slip between a table body and a driving device in rotational driving. <P>SOLUTION: The turntable comprises a rotatably supported disk-like table body 2 and a driving roller 13 pressed to the side peripheral surface of the table body 2. The side peripheral surface of the table body 2 is formed with a large number of protrusions 23 at spaces from one another by point welding, and the side peripheral surface 13a of the driving roller 13 is formed with a large number of parallel grooves 22 at spaces from one another. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a turntable and an anti-slip repair method for the turntable. More specifically, a turntable that employs a friction drive system that rotates a side peripheral surface (outer peripheral surface) of a disk-shaped table body by friction, and a slip that is applied to the existing turntable during rotational drive. It is related with the suitable repair method for preventing.

  As shown in FIG. 6, conventionally, a turntable 53 for changing the direction of a vehicle entering / exiting is generally installed outside the entrance / exit 52 of the parking device 51. With this turntable 53, the vehicle can always safely enter and exit by forward driving.

  Various rotary drive systems are adopted for the entire turntable. A friction system in which the driving roller rotates the table body using friction (see Patent Document 1, Patent Document 3, FIG. 3, Patent Document 4, and Patent Document 5), a pin rack system (see Patent Document 2, FIG. 1) ), Gear transmission system, chain sprocket system (see FIGS. 3 and 4 of Patent Document 2), and the like. A so-called friction type turntable is most widely used at present because of the advantages of simple structure, low cost, and easy installation and maintenance.

  The other three systems are all transmission systems by meshing gears and pin racks, so there is an advantage that slip between the table body and the drive side is unlikely to occur, but complicated mechanical transmission devices such as gears and sprockets are used. Since it is interposed, it is expensive and the installation work becomes large. These three types of turntables are exclusively used for turning positioning of a vehicle-mounted pallet installed inside a mechanical parking device that requires accurate positioning.

  Therefore, the turntable 53 installed outside the parking device does not require precise positioning in the millimeter unit, so that it is a simple and inexpensive structure, and is a friction type turn that is easy to install and maintain. A table is often adopted.

As shown in FIG. 7, this friction type turntable 53 has a driving roller 56 pressed by a biasing force of a compression spring 57 on a side peripheral surface of an annular rail 55 attached to an outer peripheral portion of a table body 54. The table main body 54 is rotationally driven. The driving roller 56 is driven by a driving motor 58. The friction type turntable 53 may be slipped between the table body 54 and the driving roller 56 in winter or in a cold region. That is, snow or rainwater adhering to the roof, bonnet, tire house, etc. of the vehicle falls on the upper surface of the table main body 54, and further freezes on the side peripheral surface in the process of flowing down the side peripheral surface of the annular rail 55. is there. In this case, no matter how powerfully the driving roller 56 is pressed against the side peripheral surface of the table body 54, the frictional force is extremely reduced and slipping occurs.
Japanese Utility Model Publication No.54-2549 Japanese Utility Model Publication No. 54-109888 Japanese Utility Model Publication No. 47-29341 JP-A-8-35353 Japanese Utility Model Publication No. 35-12001

  The present invention has been made to solve such a problem, and provides a friction type turntable capable of suppressing a slip between a table main body and a rotational drive side even in a winter season or a cold region. And it aims at providing the repair method for preventing the slip at the time of the rotational drive of this turntable.

The turntable of the present invention is
A disk-shaped table body supported rotatably, a driving roller pressed against a side peripheral surface of the table body, and a driving device that rotationally drives the driving roller.
A large number of convex portions formed at intervals from each other are formed on the side peripheral surface of the table body.

  Due to the presence of the multiple protrusions, the coefficient of friction of the side peripheral surface of the table main body increases, so that slip between the driving roller is effectively suppressed.

  When forming so that the said convex part may become a dot shape, since the choice of a formation method expands, it is preferable.

  This dot-like convex part can be formed by spot welding. If spot welding is employed, a convex portion having a favorable shape for slip prevention is obtained, and the forming operation is simplified and can be formed in a short time.

  You may form the said convex part as a protrusion extended up and down on the side peripheral surface of a table main body. The coefficient of friction of the side peripheral surface of the table body increases as in the case of the pointed uneven portion. In addition to attaching the ridge itself on the side peripheral surface of the table body, the ridge is formed by forming a plurality of substantially parallel grooves close to each other on the side peripheral surface. Including constructing as an article.

  It is preferable that a groove extending vertically is formed on the side peripheral surface of the driving roller. Friction between the table body and the driving roller is further increased, and draining on the side peripheral surface of the table body is improved.

  A ridge extending vertically may be formed on the side peripheral surface of the driving roller. An effect similar to that of forming the groove as described above can be obtained.

  You may form the said groove | channel or protrusion in the side peripheral surface of the said driving roller inclined in the circumferential direction. In this case, for example, when the rotation direction of the driving roller coincides with the inclination direction from the lower end to the upper end of the groove, for example, the driving roller in FIG. 3 rotates right (and therefore the table body rotates in reverse). In some cases, the water gathered in the groove flows down smoothly. Therefore, it is suitable for a one-way turning table (for example, only for left rotation in FIG. 3).

  You may form the said convex part by sticking the striped steel plate which has a convex part on the side surrounding surface of the said table main body. Since the striped steel plate has a large number of convex portions, the coefficient of friction of the side peripheral surface of the table body also increases in this case.

The anti-slip repair method of the turntable of the present invention is
An anti-slip repair method for a turntable that prevents slip between a disk-shaped table body and a driving roller that presses and rotates the side peripheral surface of the table body,
The method includes a step of forming a spot-like build-up portion by spot welding at a distance from each other on the side peripheral surface while rotating the table body. Since the spot welding operation is exclusively performed, a slip prevention measure between the table main body and the driving roller can be applied by a simple and short-time operation.

Another anti-slip repair method of the present invention is:
An anti-slip repair method for a turntable that prevents slip between a disk-shaped table body and a driving roller that presses and rotates the side peripheral surface of the table body,
Preparing a plurality of strip-shaped and arc-shaped striped steel plates having substantially the same width as the width of the side peripheral surface of the table body and having substantially the same radius of curvature as the side peripheral surface of the table body;
A step of affixing the striped steel plate on the side peripheral surface while rotating the table body.

  These anti-slip refurbishing methods further include a step of forming a groove extending in the vertical direction at intervals on the side circumferential surface of the driving roller while rotating the driving roller. It is preferable because the friction between the two becomes larger.

  In the turntable according to the present invention, the friction coefficient of the side peripheral surface of the table main body increases due to the presence of a large number of convex portions, so that slip between the driving roller and the driving roller is effectively suppressed.

  DESCRIPTION OF EMBODIMENTS Embodiments of a turntable and a slip prevention and repair method according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a partially cutaway plan view showing an embodiment of a turntable according to the present invention. 2 is a cross-sectional view taken along the line II-II in FIG.

  As shown in the figure, the turntable 1 includes a table body 2 having a disk shape, and a drive device 3 that rotationally drives the table body 2. Both 2 and 3 are installed in the pit P formed on the floor surface. The pit P includes a circular portion (circular pit) P1 that accommodates the table body 2 and a rectangular portion (hereinafter referred to as a driving portion pit) P2 that communicates with the circular pit P1 and accommodates the driving device 3. The upper surface of the table body 2 coincides with the floor surface (vehicle traveling surface) F.

  The table body 2 includes a frame 4 made of various shape steels assembled in a state of being directed radially and circumferentially, a top plate 5 made of a so-called striped steel plate affixed to the upper surface of the frame 4, and the frame 4 The basic structure is made from the annular rail 6 affixed to the side periphery. The vehicle M gets on the top board. In the pit P, there is installed a bearing member 7 that rotatably supports a shaft portion formed at the center (rotation center) of the lower surface of the table body 2, and the lower surface of the annular rail 6 when the table body 2 rotates. A plurality of support rollers 8 for supporting the above are installed. A part of the top plate 5 of the table body 2 is detachable from the framework 4 as a lid 9 for inspection. A drain port D is formed at the bottom of the pit P.

  The drive device 3 is shown in detail in FIGS. The driving device 3 is installed in the vicinity of the table main body 2, and can swing toward the table main body 2 by the pivot body 11 on the base plate 10 fixed to the bottom of the driving unit pit P <b> 2. And a gantry 12 attached thereto. A drive roller 13 and a drive motor 15 that drives the drive roller 13 via a worm speed reducer 14 are mounted in the gantry 12. A biasing device 16 that biases the gantry 12 toward the table body 2 is attached to the base plate 10.

  As shown in the figure, the urging device 16 includes a screw rod 18 inserted through a through hole 17 formed in the gantry 12, and a compression spring 19 mounted between the base end of the screw rod 18 and the gantry 12. And. The tip of the screw rod 18 is inserted into a through hole of a holding member 20 projecting from the base plate 10, and a nut 21 is screwed into the screw rod 18 to prevent the screw rod 18 from coming off in the proximal direction. . An adjustment nut 18a also serving as a spring seat and a lock nut 18b are screwed to the base end portion of the screw rod 18. Due to the elastic force of the compression spring 19, the gantry 12 is biased so as to swing toward the table body 2 around the pivot shaft 11 a of the pivot body 11. Due to this urging force, the driving roller 13 is elastically pressed against the annular rail 6 of the table main body 2, and the friction necessary for rotationally driving the table main body 2 is obtained.

  In order to increase the friction between the driving roller 13 and the annular rail 6 of the table body 2, a plurality of grooves 22 that are substantially parallel to each other are formed in the width direction of the side peripheral surface 13a (roller). (Axial direction). When the driving roller 13 is pressed against the annular rail 6 and the table main body 2 is driven to rotate, the groove 22 is effective even when the annular rail 6 is wet or rainwater flows down from the top plate 5 to the annular rail 6. The advantage of being able to drain water is obtained. The groove 22 is slightly inclined in the circumferential direction from the axial direction of the driving roller 13. Of course, it may be formed parallel to the axial direction, but it is preferable to incline it slightly because water gathered in the groove effectively flows downward. For example, when the rotation direction of the driving roller 13 coincides with the inclination direction from the lower end to the upper end of the groove 22, the water gathered in the groove flows smoothly. Therefore, it is suitable for a one-way turning table. That is, when the rotation driving roller 13 rotates in the circumferential direction in which the groove 22 in FIG. 3 is inclined from the lower end toward the upper end (the direction from right to left in the driving roller 13 in FIG. 3) (right rotation). ) Has the advantage that the water gathered in the groove flows down smoothly. In this case, the table body 2 is exclusively for left rotation.

  Since the driving roller 13 is formed of a synthetic resin such as urethane resin, the groove 22 may be formed at the stage of manufacturing the mold for molding the roller, or may be ground by an electric grinder after the roller is molded. May be formed. Further, in place of the groove 22, a plurality of ridges that are parallel and close to each other may be formed. In this case, a portion between the protrusions can be called a groove.

  As shown in FIG. 3, a large number of convex portions (projections) 23 are formed at predetermined intervals on the side peripheral surface of the annular rail 6 in order to increase the friction with the driving roller 13. In this embodiment, since the protrusion 23 is formed as a build-up part by spot welding, its diameter is about 5 mm and its height is about 3 mm, but of course it is not limited to this size. Moreover, in this embodiment, the annular rail 6 whose vertical width is about 50 mm and whose diameter is about 4000 mm is illustrated. As shown in the figure, three protrusions 23 are formed at equal intervals in the vertical direction. Although it is formed at equal intervals in the circumferential direction as well, this distribution is merely an example and need not be limited. As a result of the test, even if the turntable has only the protrusion 23 formed on the annular rail 6 by spot welding without forming the groove 22 in the driving roller 13, slip can be prevented in the icing state and the rainwater adhering state. It could be confirmed.

  In the present embodiment, the protrusions 23 are formed by build-up by spot welding, but are not limited to such a forming method. For example, a bolt head may be used as a protrusion by drilling a number of bolt holes in the side peripheral surface of the annular rail 6 and screwing the bolt into the bolt hole. May be a protrusion, or may be formed by other known methods. However, spot welding is much easier and cheaper.

  For example, when a renovation work for newly forming the above-described protrusion 23 by spot welding is performed on an existing turntable provided with an annular rail having a flat side peripheral surface, the following is performed. First, the lid B (see FIG. 2) of the drive unit pit P2 accommodated in the drive device 3 is opened. Then, a part of the annular rail 6 of the table main body 2 is exposed together with the driving device 3. An operator enters the drive unit pit P2, and marks the portions to be welded of the annular rail 6 while measuring the dimensions while rotating the table body 2 little by little. Next, the marking body is overlaid by spot welding while rotating the table body 2 little by little again.

  During the spot welding, before the spot welding, or after the spot welding, the groove 22 may be formed on the side peripheral surface 13a of the driving roller 13 by an electric grinder or the like. When the groove 22 is formed in the driving roller 13, marking may be performed while rotating the table body 2 little by little and simultaneously rotating the driving roller 13 by friction with the table body 2 at this time. Alternatively, the groove forming operation may be performed while only the driving roller 13 is rotated after the compression spring 19 of the driving device 3 is loosened.

When the projections 23 are formed on the annular rail 6 having the above distribution with the above distribution, about seven welding rods having a nominal diameter of 4 mm are used, and two workers take about 30 minutes (about 60 minutes in total). Thus, since the material cost is extremely low and the work time is short, it is not necessary to stop the operation of the parking device, and this renovation work can be performed in the interval between the entry and exit of the vehicle.

  FIG. 5 shows another turntable 25. This turntable 25 has a band-shaped so-called striped steel plate (strip steel plate) 26 attached to the side peripheral surface of the annular rail. A striped steel plate is a steel plate in which a notch is made on the surface of a rolling roll and a pattern such as a non-slip is regularly raised on one side of the steel plate as shown (according to JIS steel plate terminology). In this embodiment, a large number of short ridges 27 extending in directions orthogonal to each other are arranged at appropriate intervals. As described above, the shape of the side peripheral surface of the annular rail 6 is different from the turntable 1 shown in FIG. 3, and the other shapes and structures are the same. Omitted. The striped steel plate 26 is formed in a belt shape having the same width as the width of the side peripheral surface of the annular rail 6 and is adhered to the side peripheral surface of the annular rail by welding, bolting or the like. It is convenient if a plurality of the strip-shaped striped steel plates are made to have a length corresponding to the outer peripheral length of the annular rail. As the striped steel plate, the same one as that often used for the top plate 5 of the table body may be adopted. The table main body 28 using the striped steel plate 26 also generates effective friction between the driving roller 13 and the rotational force.

  When renovation work for newly attaching the aforementioned striped steel plate to an existing turntable is performed as follows. First, a plurality of striped steel strips curved to have a curvature radius substantially the same as the outer peripheral radius of the annular rail is prepared. The total length of each of the plurality of striped steel plates is the outer peripheral dimension of the annular rail 6. Next, the lid B (see FIG. 2) of the drive unit pit P2 accommodated in the drive device 3 is opened. The table body 8 is rotated little by little, and the outer edge of each striped steel plate is attached to the side peripheral surface of the annular rail one by one by fillet welding or the like.

  When bolting, bolt holes are previously formed at predetermined positions on each striped steel plate. And the table main body 8 is rotated little by little, marking is performed on the position on the annular rail corresponding to the bolt hole of the striped steel plate, and the tapped hole is processed at this marking position. Next, each striped steel plate is bolted to the annular rail.

  In the embodiment described above, the protrusions 23 are provided on the side peripheral surface of the annular rail to increase the friction coefficient, or the striped steel plates 26 are adhered. However, it is not limited to such a configuration. For example, you may form many protrusions extended in an up-down direction (width direction) at predetermined intervals (for example, equal intervals) on the side peripheral surface of an annular rail. The ridge may be formed by, for example, building up a line by welding. Alternatively, a steel wire may be fixed to the side peripheral surface of the annular rail by spot welding or the like. The protrusions are preferably substantially parallel to each other, and may be slightly inclined from the vertical in the circumferential direction in addition to the vertical direction.

  Further, a plurality of grooves extending in the vertical direction (width direction) with a predetermined interval (for example, equal intervals) may be formed on the side peripheral surface of the annular rail. The groove can be formed by, for example, an electric grinder. The grooves are preferably substantially parallel to each other, and may be slightly inclined from the vertical in the circumferential direction in addition to the vertical direction. Moreover, since the effect will become low if the space | interval of groove | channels is made too wide, it is necessary to make it appropriate narrowness. For example, when the table main body is rotated by the driving roller 13, an interval that allows the side peripheral surface 13 a of the driving roller 13 to always contact any one of the groove edges is preferable.

  When the ridges and grooves are formed in this way, the same effects as the above-described protrusions can be obtained, and rainwater and the like can be effectively flowed downward from the side peripheral surface of the annular rail.

  The turntable and the repair method of the present invention can be applied not only to a special parking apparatus but also to a turntable used for other equipment as long as it is a friction system. It is also useful because it can be applied to existing turntables.

It is a partially notched top view which shows one Embodiment of the turntable of this invention. It is the II-II sectional view taken on the line of FIG. It is a perspective view which mainly shows the part of a drive device of the turntable of FIG. It is the IV-IV line arrow directional view of FIG. It is a perspective view which shows a part of other embodiment of the turntable of this invention. It is a perspective view which shows an example of the entrance / exit of the parking apparatus with which the turntable of this invention can be applied. It is a perspective view which mainly shows the part of the drive device of the conventional turntable.

Explanation of symbols

1 ... Turntable
2 ... Table body
3 ... Drive device
4 ... Framework
6 .... Annular rail
7. Bearing member
8 ... Support roller
9 ... Inspection lid
10. Base plate
11. Axis body
12 ... Stand
13... Driving roller
14 ... Worm reducer
15 ... Drive motor
16 .... Biasing device
17 ... Through hole
18 ··· Screw rod
19... Compression spring
20... Holding member
21 ... Nut
22... Groove (of driving roller)
23... Projection
25 ... Turntable
26 ... Striped steel plate
27 ...
28 ... Table body
B ... Lid
D ... Drain outlet
F ... Vehicle running surface
M ・ ・ ・ ・ Vehicle
P ... Pit

Claims (11)

A disk-shaped table body that is rotatably supported, a driving roller that is pressed against a side peripheral surface of the table body, and a driving device that rotationally drives the driving roller.
A turntable comprising a plurality of convex portions formed on the side peripheral surface of the table main body at intervals.   The turntable according to claim 1, wherein the convex portion has a dot shape.   The turntable according to claim 2, wherein the dot-like convex portions are formed by spot welding.   The turntable according to claim 1, wherein the convex portion is a ridge extending vertically on the side peripheral surface of the table body.   The turntable according to claim 1, wherein a groove extending vertically is formed on a side peripheral surface of the driving roller.   The turntable according to claim 1, wherein a protrusion extending vertically is formed on a side peripheral surface of the driving roller.   The turntable according to claim 5 or 6, wherein the grooves or ridges extending vertically on the side peripheral surface of the driving roller are formed to be inclined in the circumferential direction.   The turntable according to claim 1, wherein the convex portion is configured by sticking a striped steel plate having a convex portion on a side peripheral surface of the table body. A slip table anti-slip repair method for preventing slip between a disk-shaped table body and a driving roller that presses and rotates the side peripheral surface of the table body,
An anti-slip repair method for a turntable comprising a step of forming a spot-like build-up portion by spot welding with a space between the table body while rotating the table body. A slip table anti-slip repair method for preventing slip between a disk-shaped table body and a driving roller that presses and rotates the side peripheral surface of the table body,
Preparing a plurality of strip-shaped and arc-shaped striped steel plates having substantially the same width as the width of the side peripheral surface of the table body and having substantially the same radius of curvature as the side peripheral surface of the table body;
A method for preventing slip repair of a turntable comprising the step of affixing the striped steel plate to the side peripheral surface while rotating the table body. The method for preventing slip repair of a turntable according to claim 9 or 10, further comprising a step of forming a groove extending in the vertical direction at an interval on the side peripheral surface while rotating the driving roller.

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