JPH0678656U - rack - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a rack that is lightweight, inexpensive, and easily manufactured. [Structure] A predetermined distance P is provided on one surface of the flat plate 11.
Then, the plurality of protrusions 12 that can mesh with the pinion gear 31 are processed by press working to form the rack 10.
The height H of the protrusion 12 is higher than the height h of the tooth tip of the meshing pinion gear.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rack that meshes with a pinion gear and converts the rotational movement of the pinion gear into a linear movement.

[0002]

[Prior art]

 FIG. 14 is a perspective view of a pinion gear 2 that meshes with a conventional rack 1. When the pinion gear 2 is rotated about the axis O in the R1 direction, the rack 1 can be linearly moved in the S1 direction. For example, the pinion gear 2 is directly connected to the rotary shaft of the motor, and the rack 1 is attached to a moving table or the like. At this time, if the pinion gear 2 and the rack 1 are meshed with each other in the state shown in FIG. 14, the moving table can be moved in a linear direction in accordance with the rotation of the motor. As described above, the rack 1 is highly useful as a mechanism for converting rotary motion into linear motion, and is used in many machines. The rack 1 is generally manufactured by using a bob board or the like. For example, the metal material of the rack 1 is cut out one by one by a tool (bob) having the same shape as the tooth groove of the rack 1 to be formed and cut.

[0003]

[Problems to be solved by the device]

 The conventional rack 1 has a large thickness t in order to maintain a constant strength as shown in FIG. Therefore, the weight of the rack 1 is large. Further, since the rack 1 is formed by cutting the metal material as described above, it takes time to work. Therefore, the material cost and the processing cost of the rack 1 are high, and the price of the rack 1 as a product is high.

Further, when the machine is manufactured by mounting the rack 1, the rack 1 is inconvenient to handle because it is thick and heavy as described above.

Furthermore, since there are only a limited number of manufacturers to manufacture the rack 1 and it takes time to manufacture the rack 1, even if an order is made to manufacture the rack 1, the delivery time is often delayed.

An object of the present invention is to provide a rack that is lightweight, inexpensive, and easy to manufacture.

[0007]

[Means for Solving the Problems]

 The present invention is a rack characterized in that a plurality of protrusions capable of meshing with a pinion gear are formed at predetermined intervals on one surface side of a flat plate.

Further, the present invention is characterized in that the protrusion is formed so as to be higher than a tooth tip of a meshing pinion gear.

[0009]

[Action]

 According to the present invention, protrusions that can mesh with the pinion gear are formed on one surface side of the flat plate at predetermined intervals. Therefore, a rack can be manufactured by easily processing a lightweight material by pressing or the like. This makes it possible to obtain a rack that is lightweight, inexpensive, and easily manufactured. Furthermore, since the projection is formed on a flat plate, it is highly flexible and can be easily attached to a curved surface.

Further, the protrusion is formed so as to be higher than the tooth tip of the meshing pinion gear. Since the tooth tips of the pinion gear do not contact the flat plate, low noise and improved durability are achieved.

[0011]

【Example】

 1 is a partial plan view of a rack 10 according to an embodiment of the present invention, FIG. 2 is a front view of the rack 10 shown in FIG. 1, and FIG. 3 is a left side view of the rack 10 shown in FIG. is there.

In the rack 10, protrusions 12 are formed as teeth of the rack 10 on the surface of a flat plate 11 made of metal such as stainless steel. The protrusions 12 are trapezoidal as shown in FIG. 3, and a plurality of protrusions 12 are formed in the F direction at intervals of pitch P = 5 mm as shown in FIG. The protrusion 12 is formed to have a height H = 2 mm, a width WT = 2.5 mm, and a length WL = 10 mm, for example.

The protrusion 12 is formed by press working. In this press working method, the material is set on a press machine, and the material is pressed by a press die matching the shape of the projection 12 to form the projection 12. In this case, the material is fed by a constant pitch P along the processing guide of the press machine, the material is pressed, and the projections 12 are sequentially formed. In addition, there is a processing method in which a plurality of protrusions 12 are simultaneously formed by using a progressive die that simultaneously performs a plurality of processings in order to shorten the processing time. Furthermore, if a numerically controlled machine tool (abbreviated as “NC machine”), for example, an NC turret press is used, all the above-mentioned press working can be performed automatically and a plurality of protrusions 12 can be processed at high speed and with high accuracy. .

FIG. 4 is a plan view showing the entire rack 10 shown in FIG. The rack 10 is made of, for example, a standard length material and is manufactured in units of length L = 960 mm and width W = 50 ± 0.5 mm. Since the side surfaces 13a and 13b on both sides of the flat plate 11 are sometimes used as guides for guiding a mechanism that linearly moves while meshing with the protrusions 12 of the rack 10, they are smoothly processed by milling and the width W is , Processed with high precision.

Further, when a rack longer than the rack 10 shown in FIG. 4 is required, the racks 10 are joined to each other by using a joining metal fitting described later. The holes 15 are for passing bolts or the like when joining the racks to each other or when fixing the racks to the mounting base. Of course, a long rack may be obtained by using a hoop material as a material.

FIG. 5 is a front view showing a state where the protrusion 12 of the rack 10 and the tooth 17 of the pinion gear 16 mesh with each other. The pitch circle 20 is a point passing through a contact point 22 between the protrusion 12 a and the tooth 17 and a contact point 21 between the protrusion 12 b and the tooth 17 around the center O of the pinion gear 16. The tooth thickness WG of the tooth 17 and the width WT of the protrusion 12 are equal, the tooth thickness WG and the width WT are 1/2 of the circumferential pitch P of the pinion gear, and the following equation is established.

WT = WG = P / 2 (1) Further, the tooth tip h of the tooth 17 of the pinion gear 16 is formed to be shorter than the height H of the protrusion 12 so that the tooth 17 does not come into contact with the surface of the flat plate 11. To prevent. Therefore, the following equation holds.

H> h (2) FIG. 6 is a plan view of an ultrasonic flaw detector using the rack 10 shown in FIG. The rack 10 described with reference to FIGS. 1 to 4 is used as a mechanism for moving the X-axis table 30. In this ultrasonic flaw detector, the ultrasonic probe 31 (hereinafter abbreviated as “probe 31”) scans the surface of the object 32 for measurement while searching for a flaw in the object 32 for measurement. In the scanning method of the ultrasonic probe 31, first, the Y-axis table 34 is moved by the pulse motor 33, and the probe 31 is moved in the Y direction shown in FIG. 6 from the side surface 35 to the side surface 36 at a constant speed. . Next, the X-axis table 30 is moved by the pulse motor 39, the probe 31 is moved in the X direction by a predetermined distance L, and then the Y-axis table is moved to move the probe 31 in the Y direction. The side surface 36 is scanned in the opposite direction from the side surface 34 at a constant speed. In this way, the above-described operation is repeated until the probe 31 scans the entire surface of the DUT 32. In the flaw detection of the DUT 32, ultrasonic waves are transmitted from the probe 31, the reflected wave of the transmitted ultrasonic waves is received by the probe 31, and the flaw is judged by the state of the reflected wave.

FIG. 7 is an enlarged plan view of the vicinity of the X-axis table 30 of the ultrasonic flaw detector shown in FIG. 8 is a front view of the ultrasonic flaw detector shown in FIG. 7, and FIG. 9 is a left side view of the ultrasonic flaw detector shown in FIG. When the pulse motor 39 mounted on the X-axis table 30 is rotated in the R3 direction as shown in FIG. 8, the pinion gear 39 directly connected to the motor shaft rotates synchronously. When the pinion gear 39 rotates in the R3 direction, the projection 12 of the rack 10 and the teeth 33 of the pinion gear 31 mesh with each other, and the X-axis table 30 is fixed, so that the X-axis table 30 moves linearly in the S3 direction. At this time, as shown in FIG. 7, the rollers 40a to 40b attached to the X-axis table 30 rotate while being in close contact with both side surfaces 13a and 13b of the rack 10. Both sides of 10 are guided and moved.

Further, as shown in FIG. 9, when the pulse motor 33 attached to the X-axis table 30 is rotated in the R4 direction, the pinion gear 42 directly connected to the motor shaft rotates at the same time. When the pinion gear 42 rotates in the R4 direction, the teeth 44 of the rack 43 and the teeth 45 of the pinion gear 42 mesh with each other, and the Y-axis table 43 linearly moves in the S4 direction. At this time, as shown in FIGS. 7 and 8, the base 49 of the Y-axis table 34 comes into close contact with the rotating rollers 48a to 48d and moves while rotating the rotating rollers 48a to 48d. Therefore, the Y-axis table 34 is guided and moved by the rotating rollers 48a to 48d. As the rack 43 used here, the conventional rack shown in FIG. 13 is used.

FIG. 10 is a plan view of a unit unit of the rack 10 in the ultrasonic flaw detector shown in FIG. 6, and FIG. 11 is a right side view of the upper part thereof. 12 is a front view of the unit unit rack 10a, and FIG. 13 is a right side view thereof. The unit unit rack 10a is formed in advance with a length L1 and a width W1 as shown in FIG. 10, and the rack 10 is assembled using a plurality of the racks 10a. When the rack 10 is assembled, the racks 10a of the unit unit are joined to each other using the joint fittings 50 and 51. When the racks 10a are joined together, the fitting portion 50a of the joining fitting 50 is inserted into the joining hole 51a of the joining fitting 51 of the mating rack. The joint member 51 is fixed to the flat plate 11 in advance by the bolts / nuts 56a and 56b. Further, the joint fitting 50 is fixed to the flat plate 11 in advance by the bolts / nuts 55a and 55b. Further, the rack 10a is reinforced by corner members 57a and 57b as shown in FIG. 11, and the flat plate 11 and the corner members 57a and 57b of the rack 10a are fixed by bolts / nuts 58a to 58h.

As shown in FIG. 12, the rack 10 a is attached and fixed to the base 60. As shown in FIG. 13, the corner member 57a and the fixing member 62 of the rack 10a are fixed by bolts / nuts 58f and 58g, and the fixing member 63 is fixed to the fixing member 61 of the base 60. The fixing member 61 is attached to the base 60 with bolts 65. The shaft 67 is inserted through the U-shaped hole of the fixing member 62 and the hole of the fixing member 63. Therefore, the rack 10a can be moved around the shaft 67 in the R6 or R7 direction as shown in FIG. 12, and the angle of the rack 10 with respect to the mounting surface 70 of the base 60 can be adjusted. When the angle of the rack 10 is adjusted, the lever 71 is rotated and the shaft 67 and the fixing member 63 are fixed to each other by the bolt 73, whereby the rack 10a is fixed to the base 60. Therefore, the angle of the rack 10 with respect to the mounting surface 70 is fixed.

As described above, since the rack of this embodiment can be manufactured by pressing a lightweight material, it can be easily manufactured at a low weight and at a low price.

Although the rack of this embodiment is used as a mechanism for moving the X-axis table of the ultrasonic flaw detector as described in the embodiment, the tooth tips of the pinion gears contact the flat plate of the rack. Therefore, the X-axis table can be moved accurately and smoothly with low noise, and the overall weight of the device can be lightened to improve the durability. Therefore, the power for moving the rack can be reduced, and the drive motor can be downsized. Although a conventional rack is used for the Y-axis table of this ultrasonic flaw detector, it goes without saying that the rack of the present invention may be used.

Further, although the rack of this embodiment is used as a moving mechanism for the XY axis table of the ultrasonic flaw detector, it can be generally used as a moving mechanism for an assembling robot, material handling equipment, etc. Is. Furthermore, since the rack of this embodiment has a flat plate formed with protrusions, it is highly flexible and can be used as a moving mechanism on a curved surface by mounting this rack on a curved surface.

[0026]

[Effect of device]

 As described above, according to the present invention, a plurality of projections that can be meshed with a pinion gear are formed on one surface side of a flat plate at predetermined intervals, and can be easily manufactured at a low cost and at a low cost. You can get a rack that can. Further, since the rack of the present invention is highly flexible, it can be mounted on a curved surface for use. Furthermore, since the protrusions are formed higher than the tooth tips, the noise is reduced and the durability is improved.

[Submission date] June 18, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

FIG. 5 is a front view showing a state where the protrusion 12 of the rack 10 and the tooth 17 of the pinion gear 31 mesh with each other. The pitch circle 20 is a circle passing through a contact point 21 between the protrusion 12a and the tooth 17 and a contact point 22 between the protrusion 12b and the tooth 17 with the center O of the pinion gear 31 as the center. The tooth thickness WG of the tooth 17 and the width WT of the protrusion 12 are equal, the tooth thickness WG and the width WT are 1/2 of the circumferential pitch P of the pinion gear, and the following equation is established.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

WT = WG = P / 2 (1) Further, the tooth tip h of the tooth 17 of the pinion gear 31 is formed to be shorter than the height H of the protrusion 12 so that the tooth 17 does not come into contact with the surface of the flat plate 11. To prevent. Therefore, the following equation holds.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

H> h (2) FIG. 6 is a plan view of an ultrasonic flaw detector using the rack 10 shown in FIG. The rack 10 described with reference to FIGS. 1 to 4 is used as a mechanism for moving the X-axis table 30. In this ultrasonic flaw detector, the ultrasonic probe 38 (hereinafter abbreviated as "probe 38") scans the surface of the object 32 to be measured and searches for flaws in the object 32 to be measured. In the scanning method of the ultrasonic probe 38, first, the Y-axis table 34 is moved by the pulse motor 33, and the probe 38 is moved in the Y direction shown in FIG. 6 from the side surface 35 to the side surface 36 at a constant speed. . Next, the pulse motor 39 moves the X-axis table 30 to move the probe 38 in the X direction by a predetermined distance L, and then moves the Y-axis table to move the probe 38 in the Y direction. The side surface 36 is scanned in the opposite direction from the side surface 35 at a constant speed. In this way, the above-described operation is repeated until the probe 38 scans the entire surface of the DUT 32. For flaw detection of the DUT 32, ultrasonic waves are transmitted from the probe 38, the reflected wave of the transmitted ultrasonic waves is received by the probe 38, and the flaw is judged by the state of the reflected wave.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

FIG. 7 is an enlarged plan view of the vicinity of the X-axis table 30 of the ultrasonic flaw detector shown in FIG. 8 is a front view of the ultrasonic flaw detector shown in FIG. 7, and FIG. 9 is a left side view of the ultrasonic flaw detector shown in FIG. When the pulse motor 39 mounted on the X-axis table 30 is rotated in the R3 direction as shown in FIG. 8, the pinion gear 31 directly connected to the motor shaft rotates in synchronization. When the pinion gear 31 rotates in the R3 direction, the projection 10 of the rack 10 and the teeth 17 of the pinion gear 31 mesh with each other, and the rack 10 is fixed to the X-axis table 30, so that the pinion gear 31 linearly moves in the S3 direction. At this time, as shown in FIG. 7, the rollers 40a to 40b attached to the X-axis table 30 rotate while closely adhering to the both side surfaces 13a and 13b of the rack 10, so that the X-axis table 30 is moved to the rack. Both sides of 10 are guided and moved.

[Brief description of drawings]

FIG. 1 is a partial plan view of a rack 10 according to an embodiment of the present invention.

FIG. 2 is a front view of the rack 10 shown in FIG.

3 is a left side view of the rack 10 shown in FIG. 1. FIG.

FIG. 4 is a plan view showing the entire rack 10 shown in FIG.

FIG. 5: Protrusion 12 of rack 10 and tooth 17 of pinion gear
It is a figure showing the state where and meshed.

FIG. 6 is a plan view of an ultrasonic flaw detector using the rack 10 of the embodiment shown in FIG.

FIG. 7 is an enlarged plan view of the vicinity of the X-axis table 30 of the ultrasonic flaw detector shown in FIG.

FIG. 8 is a front view of the ultrasonic flaw detector shown in FIG.

9 is a left side view of the ultrasonic flaw detector shown in FIG. 7. FIG.

10 is a plan view of a unit unit of the rack 10 in the ultrasonic flaw detector shown in FIG.

11 is a rack 10 of the unit unit shown in FIG.
It is a right view of the upper part of a.

12 is a front view of the rack 10a shown in FIG.

13 is a right side view of the rack 10a shown in FIG.

FIG. 14 is a perspective view of a pinion gear 2 that meshes with a conventional rack 1.

[Explanation of symbols]

 10 rack 11 flat plate 12 protrusions 13a, 13b rack side surface 15 hole 16 pinion gear 30 X-axis table 31 probe 32 measured object 33, 39 pulse motor 34 Y-axis table

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 18, 1993

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of reference numerals] 10 rack 11 flat plate 12 protrusions 13a, 13b rack side surface 15 hole 30 X-axis table 31 pinion gear 32 measured object 33, 39 pulse motor 34 Y-axis table 38 probe

[Procedure correction 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure Amendment 7]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

[Procedure Amendment 8]

[Document name to be corrected] Drawing

[Correction target item name] Figure 8

[Correction method] Change

[Correction content]

[Figure 8]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuhiro Onuki 4-11-11-5-3, Mizumitsu, Higashiyodogawa-ku, Osaka-shi, Osaka Prefecture

Claims (2)

[Scope of utility model registration request] 1. A flat plate on one surface side at predetermined intervals,
A rack characterized in that a plurality of protrusions capable of meshing with a pinion gear are formed. 2. The rack according to claim 1, wherein the protrusion is formed so as to be higher than a tooth tip of a meshed pinion gear.