JPS63119297A - Method and apparatus for regulating board housing part of printed board housing rack - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a printed circuit board storage rack used for holding a large number of printed circuit boards at regular intervals during storage and transportation of the printed circuit boards. , A method and device for adjusting the board storage section in a printed circuit board storage rack, which can automatically adjust the size of the printed circuit board storage section in the printed circuit board storage rack according to the size of the printed circuit board to be stored and held. It is related to.

[Conventional technology]

Printed circuit boards, which are one of the electronic components, are used for storage and
A dedicated rack for printed circuit boards is used for transportation.

As shown in Figure 3, this dedicated printed circuit board rack can be mounted on boards according to the size of the printed circuit boards to be stored or transported. It is configured to be able to slide freely relative to the plate material (fixed plate).

In other words, rack 1 for storing printed circuit boards.
00, a pair of rectangular side plates 101 and 102 are arranged with a required interval, and the four corners are connected to metal rods 103.1.
04.105.106 to form a frame member.

On one side of this frame member, there are many parallel protrusions 1 on the inside.
07 in multiple stages is attached to form a fixed plate 108, and on the other side facing the fixed plate 108, a large number of parallel protrusions 109 are provided in multiple stages on the inside like the fixed plate 108. At the same time, a plate member having a pair of parallel rods protruding from its upper and lower end surfaces is provided, and the rods of this plate member are attached to one side of the upper and lower side plates 101 and 102. The slots 11L, 112 and 113.114 are provided in parallel with each other. or tighten it.

The movable plate 110 is attached so as to be movable in the front and back direction by loosening the movable plate 110 and the fixed plate 1.
The printed circuit boards are held at regular intervals between the opposing protrusions of 08 without coming into contact with each other.

Therefore, the movable plate 110 is configured to move in parallel to the fixed plate 108, and the interval therebetween can be freely adjusted by operating the fixing bolt.

Note that the symbols 119 and 120 are the side plates 101 and 1, respectively.
02 is a rack handle formed by a long groove.

In the rack 100 having such a configuration, printed circuit boards are inserted into the rack 100 from one opening surface along the opposing protrusions 107 and 109, so that the printed circuit boards can be stacked and held in multiple tiers without contacting each other. The printed circuit board 100 can be transported and stored safely without being damaged in any way by preventing the printed circuit board from coming out of the rack 100 by disposing a bar through the other opening surface. It is.

[Problem that the invention seeks to solve]

With the recent remarkable development of electronic devices, the demand for printed wiring boards as electronic components is increasing more and more, and along with this, printed circuit boards of various sizes are also required. Its advantage lies in the fact that the size of the storage section can be freely changed and used according to the size.

However, in such conventional racks, when changing the size of the storage section by changing the size of the printed circuit board, the movement of the movable plate 110 is such that the movable plate 110 is moved from one end to the side plate 10.
1. Loosen the fixing bolts fixed at 102 by hand, and then adjust the movable plate 110 to match the desired size of the printed circuit board.

At present, after the position of the movable plate 110 is determined, the fixing bolt is manually tightened again.

Therefore, the two operations are extremely cumbersome, require a lot of time and labor, and have poor work efficiency, which is a bottleneck in efforts to save labor.

[Means for solving problems]

This invention is the result of intensive research in view of the current situation.

To provide a method and apparatus for adjusting a board storage section in a printed circuit board storage rack, which can automatically change the size of the storage section of the rack according to the size of the printed circuit board.

The first aspect of the present invention is that protrusions are carved in multiple stages on the upper and lower surfaces of the fixed plate and the movable plate facing the fixed plate, and a large number of printed circuit boards are held at regular intervals between the protrusions. In the printed circuit board storage rack having a structure of This is a method of adjusting a board storage section in a rack for storing printed circuit boards.

(A) moving the rack with the fixed plate side facing the traveling direction, and stopping the movement of the rack by contacting the fixed plate with a clamp stopper provided in the middle of the moving direction;
and a step of checking the position of the fixing plate of the rack using a fixing gauge, and clamping the rack at that position using the fixing gauge and the clamp stopper.

(B) Bring a pressing stopper into contact with the inside of the movable plate of the clamped rack, bring the tip of the driver close to the fixing bolt of the movable plate in this state, and then position the fixed stopper on the outside of the movable plate to contact the pressing stopper. The process of clamping the movable plate by.

(C) Loosen the fixing bolt of the movable plate screwed to the rack using the driver, then move the movable plate together with the driver in the clamped state to the maximum allowable width of the movable plate movement in the rack, and then pull it back to move the movable plate to the rack. The process of stopping the machine at a predetermined position set by a moving gauge.

(D) A step of tightening the fixing bolt of the movable plate with the driver, and then approaching the driver and releasing the clamp between the fixed plate and the movable plate.

Next, in the second invention, protrusions are carved in multiple stages up and down on the facing surfaces of the fixed plate and the movable plate facing thereto, and a large number of printed circuit boards are held at regular intervals between the protrusions. In order to adjust the distance between the fixed plate and the movable plate in a printed circuit board storage rack having a structure.

■) A conveyor mechanism that moves the fixed plate of the rack ahead of the movable plate.

II) A clamp stopper that comes into contact with the outer surface of the fixing plate of the rack on the conveyor to stop the rack.

A fixing plate clamping mechanism comprising a fixing gauge that protrudes inside the fixing plate to probe and confirm the position of the fixing plate after the rack is stopped by the clamp stopper, and clamps the fixing plate in cooperation with the clamp stopper. .

III) A pressing stopper that protrudes inside the movable plate at the stop position of the rack and probes and contacts the position of the movable plate, and a pressing stopper that protrudes outside the movable plate and cooperates with the pressing stopper to move the movable plate. The movable plate clamp movement mechanism is composed of a fixed stopper for clamping, and temporarily clamps the movable plate by each of these stoppers, and then moves the movable plate toward and away from the fixed plate.

IV) A driver mechanism that moves along with the movement of the movable plate clamp moving mechanism III and is configured to loosen and tighten the fixing bolt of the movable plate in a clamped state at a predetermined time using an equipped driver.

(2) A movable gauge mechanism that is clamped by the movable plate clamp moving mechanism (2), probes the position of the moving movable plate, and holds it at a set position.

This is an adjustment device for a board storage section in a printed board storage rack, characterized by comprising:

[For production]

The method of the present invention is specifically carried out using the apparatus of the embodiment shown in FIG. 1, and the operating sequence of this apparatus will be explained in detail below.

First, the rack 100 is placed on the belt conveyor 2 of the conveyor mechanism I with its fixing plate 108 positioned on the advancing direction side.

At this time, in order to always keep the orientation of the rack 100 on the belt conveyor 2 constant as described above, the orientation of the rack 100 is detected by a sensor, and if necessary, the orientation of the rack 100 is
A conveyor with a sensor built-in rotation mechanism (not shown) is used in order to rotate the fixed plate 108 and maintain it in a constant direction at all times, especially in the direction in which the fixed plate 108 precedes the movable plate 110 with respect to the traveling direction of the conveyor belt 2. It is desirable to arrange the belt conveyor 2 immediately before the belt conveyor 2.

Note that a conveyor (not shown) with a built-in sensor rotation mechanism is installed in the direction of movement of the belt conveyor 2 to take the rack 100 adjusted to a predetermined size by the adjustment method described below in a fixed orientation. It is preferable to place it later.

The rack 100, which is placed on the belt conveyor 2 with the fixed plate 108 facing the direction of travel, moves in the direction of the arrow in FIG. 1 as the belt conveyor 2 is moved by the operation of the drive motor 3.

In the direction of movement of the belt conveyor 2, as shown in FIG. 1, a pair of left and right crack stoppers 4a and a pair of left and right fixing gauges 5a are located above, and at a lower position opposite to the crack stoppers 4a. A fixing clamp mechanism (2) consisting of a pair of left and right crack stoppers 4b and a pair of left and right fixing gauges 5b is provided, respectively.

Therefore, the rack 1 placed on the belt conveyor 2
10, when the end surface of the fixing plate 108 comes into contact with the crack stoppers 4a and 4b disposed at the front in the traveling direction due to the movement of the belt conveyor 2.

At the same time as the drive motor 3 interlocking with the crack stoppers 4a and 4b stops, the belt conveyor 2 stops moving, and the rack 100 stops at that position.

When the rack 100 stops moving, as shown in FIG. 2(a), the fixing gauges 5a and 5b (5b does not appear on the drawing) that constitute the fixing clamp mechanism (2).

Similarly, any members disposed below do not appear on the drawings. ) protrudes inside the fixed plate 10B and the fixed plate 1
While checking the position of 08, each fixing gauge 5b
, 5b come into contact with the inner surface of the fixed plate 108, and at the same time as this contact, the clamp stoppers 4a and 4b operate to press the fixed plate 108 from the outer surface side, thereby clamping the fixed plate 10.

When the process of fixing the fixed plate 108 of the rack 100 by the fixed clamp mechanism (2) is completed in this way, the pressing stopper 7a constituting the movable plate clamp moving mechanism (2) is next moved.
, 7b protrude inside the movable plate 110, and when they probe the position of the movable plate 110 and come into contact with the movable plate 110, the pressing stoppers 7a, 7b are temporarily fixed at that position. (Figure 2(a)
) At the same time, the upper and lower air cylinders 9a, 9b and the upper and lower driver members 10 that constitute the moving driver mechanism (■)
a and 10b move to the temporarily fixed position of this movable plate 110. (See FIG. 2(a)) At the same time as the operation of the movable driver mechanism (2) is completed, the fixed stoppers 8a, 8b that constitute the movable plate clamp mechanism (2) move the movable plate 110.
The movable plate 110 is protruded from the outside and comes into contact with the outer surface of the movable plate 110, and the pressing clamps the movable plate 110 in cooperation with the stop buffers a and 7b. (See FIG. 2(a)) When the clamping of the movable plate 110 by the movable plate clamping mechanism (2) is completed, the driver members 10a, 10b of the movable driver mechanism (2) move the upper and lower side plates 101 of the rack 100,
A fixing bolt for fixing the movable plate 110 at 102 (not shown in FIGS. 1 and 2).

115 and 116) of the rack shown in Figure 3, and loosen these stoppers 115 and 116, respectively. (See FIG. 2(a)) At this point, a sensor is activated to determine the width of the newly set printed circuit board.

The movable plate 110 is moved by the moving driver mechanism (■) to the side plate 101.
When the work of loosening the fixing bolts 115 and 116 fixed to the movable plate 102 is completed and the movable plate 110 becomes free with respect to the rack 100, the pressing stoppers 7a, 7b and the fixed stoppers 8a, 8b of the movable plate clamping mechanism III are released. Movable plate 1
With the movable plate 110 still clamped, move both the front and the moving driver mechanisms to the right as shown by the arrows in FIG. The movable plate 110 is moved to the full maximum movement width.

On the other hand, the movement of the movable plate 110 to the maximum movement width.

At the point when the operation of the movable plate clamp mechanism III is completed, the moving gauge mechanism (2) which is linked to the sensor for determining the width of the newly set printed circuit board described above is operated, and the feed screw constituting the moving gauge mechanism (2) operates. 15a
, move gauge 1 to the rack width position preset in 15b.
4a and 14b are activated and protrude into predetermined positions within the rack 100.

Therefore, the movable plate 110, which has been moved to the maximum movement width by the movable plate clamp mechanism (2), immediately reverses itself and starts moving in the direction shown by the arrow in FIG. 2(b) after completing the movement to the maximum movement position.

When the movable plate 110 comes into contact with the movable gauges 14a and 14b, the movable plate clamp mechanism 2 stops operating. (Refer to FIG. 2(c)) At this time, as the movable plate clamp mechanism III reverses, the movable driver mechanism ■ also moves in reverse at the same time and stops at the stop position of the movable plate 110, and the movable driver mechanism ■
When the driver members 10a and 10b act as sensors to accurately detect the position of the set screw, the upper driver member 10a lowers onto the set screw, and the lower driver member 10b rises below the set screw. Tighten these setscrews to the specified tightening torque.

By the operation of this driver mechanism ■, the side plate 101°10
When the screwing of the movable plate 110 to 2 is completed, the driver members IQa, 10b are separated from the rack, and the fixed plate clamp mechanism (2) and the movable plate clamp mechanism (2), which respectively fixed the fixed plate 108 and the movable plate 110, The clamp is released, and at the same time, the belt conveyor 2 is started again and the rack 100 is adjusted in two intervals (see FIG. 2(d)).
advances to the left and is taken over, completing the interval adjustment.

In addition, in the adjustment device according to the present invention, the detection and confirmation of the positions of each of the stoppers, each of the gauges, and the driver is performed by a photoelectric sensor (not shown) attached to each of the stoppers, and this is performed by the above-mentioned. The device itself is automated by incorporating it into the mechanisms of each part and making them work together.

Here, the pressing stoppers 7a, 7b and the fixed stoppers 8a, 8b, which constitute the movable plate clamp mechanism (■), are attached to the movable plate 11.
While still clamping the movable plate 110 in the rack 100, move it in the direction of the arrow (right) shown in FIG. The reason for adopting the method of moving at one end, then reversing and moving to the left is as follows.

That is, since printed circuit boards of different sizes are used, when adjusting the movable plate 110 according to the size of the printed circuit board to be used, the movable plate 11 of the rack 100
When adjusting the movable plate 110 by narrowing the interval from the initial setting position and moving it closer to the fixed plate 108, or conversely by widening the interval and moving away from it, the movable plate 110 is fixed. The distance of approach or separation from the plate 108 also varies widely.

Therefore, in the method and apparatus for adjusting the board storage section in a printed circuit board storage rack according to the present invention, this interval adjustment is basically performed using a movable gauge 14a interlocking with a sensor between the fixed plate 10 and the movable plate 110; 14b is projected to adjust the spacing.

Assuming the two cases of approach and separation in the adjustment of the movable plate 110, the reference operation is as follows:
By always moving the movable plate 110 to the maximum allowable width of the movable plate 110 and then moving it to the set positions of the movable gauges 14a and 14b, it is possible to ensure that the movable gauges 14a and 14b are connected to the fixed plate 108. Movable plate 110
It is possible to immediately respond to any of the cases of connection and separation, and also simplifies the adjustment operation and eliminates the complexity of the device, ensuring reliable adjustment. is what you get.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the adjustment device for a board storage section in a printed circuit board storage rack according to the present invention will be described in more detail based on the accompanying drawings.

FIG. 1 is a schematic side view showing an example of an adjustment device for a board storage section in a printed circuit board storage rack of the present invention, and FIG. 2 is a schematic plan view for explaining the structure and operation of the adjustment device.

The adjustment device 1 for movable plates in a rack includes a conveyor mechanism I for placing the rack 100 shown in FIG. A fixed plate clamping mechanism (2) for fixing the movable plate 110 of the rack 100 in a predetermined position, a movable plate clamping mechanism (2) for clamping the movable plate 110 of the rack 100 and reciprocating the movable plate 110 by a predetermined distance, A movable driver mechanism (1) equipped with a driver for loosening the fixing bolt of the fixed movable plate 110 to make it movable and tightening the fixing bolt to change it from the movable state to the fixed state, and moving the movable plate 110 to the set position. Consists of a moving gauge mechanism■ for fastening and fixing.

The conveyor mechanism I drives a belt conveyor 2 by a drive motor 3, and a rack 1 placed on the belt conveyor 2.
00 to the position where the fixed plate clamp mechanism (2) is located (in the direction of the arrow in FIG. 1).

At that time, the rack 100 has a fixed plate 108 and a movable plate 110.
The protrusions 107 and 109 formed opposite to each other are horizontal, and the fixed plate 108 is positioned forward in the direction of movement, and the movable plate 110 is left behind and placed on the belt conveyor 2. .

The fixed plate clamp mechanism (■) is arranged at the left end of the adjustment device and is moved up and down by one air cylinder 6a at the upper part, and has a pair of left and right clamp stoppers 4a that perform predetermined operations, and one air cylinder 6b at the lower part. It consists of a pair of left and right clamp stoppers 4b that move up and down to perform predetermined operations, and fixing gauges 5a and 5b arranged near each of these clamp stoppers 4a and 4b (on the right side in FIG. 1).

The clamp stopper 4a is lowered from the upper side of the rack 100, and the clamp stopper 4b is similarly raised from the lower side and comes into contact with the upper and lower ends of the rack 100 to stop the movement of the rack 100. The fixing plate is fixed at a position based on 10 days in cooperation.

Furthermore, the fixing gauges 5a and 5b are provided with air cylinders so as to protrude from the upper and lower positions of both sides of the transported rack 100 toward the inner surface of the fixing plate 108, and to be retracted to their original predetermined positions. Detect and confirm the position of the fixing plate 108, and at this position clamp stoppers 4a, 4b
The rack 100 is fixed by clamping the fixing plate 108 in cooperation with the fixing plate 108.

The fixed plate 108 is detected using a photoelectric sensor (not shown).
The fixing gauges 5a and 5b are configured to interlock with this photoelectric sensor.

The movable plate clamp moving mechanism ■ is connected to the fixed gauge 5'a.
, 5b are a pair of left and right pressing stoppers 7a which are configured to protrude inside the rack 100 and be retracted to the original position by a mechanism similar to the above.

In addition, a pair of left and right pressing stoppers 7b are disposed below, and a pair of left and right fixed stoppers 8a, which are similarly configured to protrude outside the movable plate 110 and be retracted into the original position, are disposed upwardly, and also on the left and right sides. - It is constructed by arranging a pair of fixed stoppers 8b below, respectively.
Each stopper is capable of reciprocating in the front-rear direction (left and right in the drawing).

These pressing stoppers 7a, 7b and fixed stopper 8a,
8b on the movable plate 110, first, the pressing stoppers 7a and 7b protrude inside the movable plate 110, and the movable plate 11
0, the fixed stopper similarly moves the movable plate 110
The movable plate 110 is clamped by both of the movable plate 110 in the right direction of the figure in this clamped state, and then reversed and movable gauges 14a and 14b (described later) are moved. It performs the operation of stopping at the set position.

The detection function of each stopper with respect to the movable plate 110 during these operations is also performed using the same photoelectric sensor (not shown) as described above.
Its function is achieved by interlocking this with each stopper.

The moving driver mechanism ■ is attached to the upper and lower side plates 10 of the rack 100.
Fixing bolt 115 of movable plate 110 screwed to 1,102
, 116 has a function for loosening and tightening.

It is composed of a pair of left and right upper driver members 10a that are moved up and down by an air cylinder 9a, and a pair of left and right lower driver members 10b that are similarly moved up and down by an air cylinder 9b, and that move with the movement of the movable plate clamp moving mechanism III. It is.

The movable plate clamp moving mechanism (■) and the moving driver mechanism (■) are operated by a drive motor 11. Bell H6a.

16b and 16c to the respective locations.

A photoelectric sensor is also used to probe the fixing bolts at the tips of the driver members 10a and 10b, and the moving driver mechanism ■
This is done by incorporating it into

The moving gauge mechanism (2) is arranged on both sides of the rack at the top of the adjustment device in the direction of movement, and is connected to the stepping motor 13.
A moving gauge 14a is attached to a pair of feed screws 15a to which rotation is transmitted via the timing belt 12.

In addition, they are placed on both sides of the rack in the direction of travel at the bottom of the adjustment device.
A moving gauge 14b is provided on a pair of feed screws 15b whose rotation is transmitted by the stepping motor 13, and the moving gauges 14a and 14b are moved to the left and right in FIG. 1 by the feed screws 15a and 15b, respectively. It is possible.

The adjustment method and operation of the movable plate 110 by the adjustment device 1 equipped with the mechanisms I to II are as described in the previous section.

〔Effect of the invention〕

The method for adjusting the board storage section in the printed circuit board storage rack of the present invention is to place the rack to be adjusted on a conveyor, clamp the fixing plate of the rack at a predetermined position,
After clamping the movable plate facing the fixed plate and loosening the fixing bolt of the movable plate with a screwdriver, move the movable plate once to the maximum permissible width of movable plate movement, then pull it back and set this as a reference to the fixed plate. The movable plates are stopped at a predetermined interval, and then the fixing bolts are tightened with a screwdriver, and the rack with the adjusted interval is carried out using a conveyor.

Therefore, when changing the size of the storage section depending on the size of the printed circuit boards in a rack configured to accommodate printed circuit boards of different sizes, the method of the present invention can automatically and efficiently carry out the adjustment work. It is something that can be done.

On the other hand, the device for adjusting the board storage section of the printed circuit board storage rack of the present invention includes a conveyor mechanism for placing and moving the rack to be adjusted, a fixing plate clamp mechanism for clamping and fixing the fixing plate of the rack, and a rack. A movable plate clamp movement mechanism that clamps a movable plate and moves it back and forth in a predetermined manner, and a movable plate clamp movement mechanism that loosens the stop bolt of the movable plate fixed to the rack to make it movable, and tightens the stop bolt to change it from a movable state to a fixed state. The device is composed of a movable driver mechanism equipped with a driver, and a movable gauge mechanism for fixing the moving movable plate at a set position.

Therefore, there is no need to manually measure and change the distance between the fixed plate and the movable plate for each individual rack, which greatly saves adjustment work time and improves reliability and accuracy. Together, these can greatly improve work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing an example of an adjustment device for a board storage section in a printed circuit board storage rack of the present invention, and FIG. 2 is a schematic diagram for explaining the structure and process of the device for adjusting the movable plate in the rack. FIG. 3 is a plan view, in which (a) shows the clamped state of the fixed plate and the movable plate, (b) shows the state when the movable plate is moving, (C) shows the state when the movable plate is stopped moving, and (d) shows the distance between the fixed plate and the movable plate. Indicates the condition of the adjusted rack. FIG. 3 is a perspective view showing an example of a rack applied to the apparatus of the present invention. 1... Adjustment device 2... Belt conveyor 4a, 4
b... Stoppers 5a, 5b... Fixing gauges 7a, 7b... Pressing stoppers 8a, 8b... Fixed stoppers 9a, 9b... Air cylinders lQa, 10b... Driver members 14a, 14b... ...Moving gauges 15a, 15b...Feed screw 100...Rack 101, 102...
Side plates 107, 109... protrusions 108...
Fixed plate 110... Movable plate 115, 116... Fixing bolt Patent applicant: Saya Co., Ltd., agent, patent attorney, Yuki 1) Zen Hiro Figure 2 (0) (b) n (c) (d) 5a
100C 4a 90 Figure 3

Claims (2)

[Claims] (1) A printed circuit board having a structure in which protrusions are carved in multiple stages above and below on the facing surfaces of a fixed plate and a movable plate facing it, and a large number of printed circuit boards are held at regular intervals between the protrusions. In the storage rack, the spacing between the board storage parts consisting of the fixed plate and the movable plate is adjusted as follows (A) to (
A method for adjusting a board storage section in a printed circuit board storage rack, characterized in that the method is carried out sequentially according to the steps of D). (A) moving the rack with the fixed plate side facing the traveling direction, and stopping the movement of the rack by contacting the fixed plate with a clamp stopper provided in the middle of the moving direction;
and a step of checking the position of the fixing plate of the rack using a fixing gauge, and clamping the rack at that position using the fixing gauge and the clamp stopper. (B) Bring a pressing stopper into contact with the inside of the movable plate of the clamped rack, bring the tip of the driver close to the fixing bolt of the movable plate in this state, and then position the fixed stopper on the outside of the movable plate to contact the pressing stopper. The process of clamping the movable plate by. (C) Loosen the fixing bolt of the movable plate screwed to the rack using the driver, then move the movable plate together with the driver in the clamped state to the maximum allowable width of the movable plate movement in the rack, and then pull it back to move the movable plate to the rack. The process of stopping the machine at a predetermined position set by a moving gauge. (D) A step of tightening the fixing bolt of the movable plate with the driver, and then approaching the driver and releasing the clamp between the fixed plate and the movable plate. (2) A printed circuit board having a structure in which protrusions are carved in multiple stages above and below on the facing surfaces of a fixed plate and a movable plate facing it, and a large number of printed circuit boards are held at regular intervals between the protrusions. An adjustment device for a board storage section in a printed circuit board storage rack, characterized in that the storage rack is equipped with the following mechanisms I to V in order to adjust the distance between the fixed plate and the movable plate. I) A conveyor mechanism that moves the fixed plate of the rack ahead of the movable plate. II) A clamp stopper that comes into contact with the outer surface of the fixing plate of the rack on the conveyor to stop the rack, and after the clamp stopper stops the rack, it protrudes inside the fixing plate to probe and confirm the position of the fixing plate, and A fixed plate clamping mechanism consisting of a fixing gauge that clamps the fixed plate in cooperation with a clamp stopper. III) A pressing stopper that protrudes inside the movable plate at the rack stop position and probes and contacts the position of the movable plate, and a pressing stopper that protrudes outside the movable plate and cooperates with the pressing stopper to clamp the movable plate. The movable plate is temporarily clamped by each of these stoppers, and
Thereafter, a movable plate clamp moving mechanism moves the movable plate toward and away from the fixed plate. IV) A driver mechanism that moves along with the movement of the movable plate clamp moving mechanism III and is configured to loosen and tighten the fixing bolt of the movable plate in a clamped state at a predetermined time using an equipped driver. V) A movable gauge mechanism that is clamped by the movable plate clamp movement mechanism II, probes the position of the moving movable plate, and holds the movable plate at a set position.