JPH0454470Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for adjusting the height of a heat block of an IC preheater.

In this invention, the heat block height refers to the IC
It refers to the distance between the shuttle rail that makes the IC slide and the heat block that heats the IC, and does not necessarily refer to the distance (altitude) perpendicular to the earth.

[Prior art]

The IC preheater is a device that preheats the ICs to a predetermined temperature while sequentially transporting the ICs to be tested when automatically testing a large number of ICs.

FIG. 2 is a sectional view of an example of a conventional IC preheater. The preheater in this example has 4
A row of chutes 2 is provided, over which the ICs 3 are transported by gravity sliding.
Heat blocks 4 are provided above the ICs 3 on the four rows of chutes 2, respectively. 4a is an electric heater within the heat block 4.

The clearance between the heat block 4 and the IC 3 must be precisely adjusted. If this clearance is out of order, the preheat temperature of the IC will be out of order, and if the clearance is too small, smooth transportation of the IC will be hindered.

By the way, when the type of IC to be inspected changes, the thickness of the IC changes, so the height of the heat block of the IC preheater must be readjusted accurately.

The height adjusting device for the heat block 4 in the conventional IC preheater (FIG. 2) has the following structure.

A side plate 5 is fixed on the base 1. On the other hand, the heat block 4 is attached to the horizontal side of the upper base 6 having an L-shaped cross section, and means for guiding the vertical side up and down along the side plate 5 and means for fixing it (both not shown) are provided. It is provided.

In order to move the above Atsupa base 6 up and down,
An eccentric cam 7 is provided and fits into a cam follower 6a formed on the upper base 6. 7a is an eccentric camshaft, and 7b is a manual handle.

In the conventional adjustment device described above, the upper base 6 moves up and down in a stepless manner as the handle 7b rotates, so it cannot be set at a predetermined height without using some kind of measuring tool. Moreover, there is a problem in that a large force is required to manually move the upper base 6 and the heat block 4, which are heavy members, up and down.

In addition to the conventional example shown in Figure 2, there is also a conventional example with a structure in which the height of the atsupah base 6 can be changed by adjusting shims, but this requires a lot of work to adjust the shims, and the replacement shims have to be stored and stored. There must be.

In addition, there is a conventional example of a structure in which the height of the upper base 6 is adjusted using a screw rod and a nut member.
Since this is also a stepless adjustment, it has the same problems as the conventional example shown in FIG. 2, and also has the inconvenience of having to use an adjustment tool.

In view of the above circumstances, in order to quickly and easily adjust the height of the heat block accurately without requiring a large force and without using any special tools or measuring instruments, the height of the heat block in Figs.
A configuration as shown in the figure is possible. This device was devised by the present inventor and is currently under separate application, hereinafter referred to as the prior application (Utility Application No. 151495, 1982).

Next, one embodiment of the prior application will be described with reference to FIGS. 3 and 4.

Assuming three orthogonal axes X, Y, and Z, align the transport direction of the shoot rail 2 with the Y axis. Therefore, the Z axis is not necessarily perpendicular to the earth. For convenience of explanation, the Z direction of the arrow will be referred to as up, and the Z' direction will be referred to as down.

A pair of support columns 8 are fixed on the base 1, and a bar 9 is fixed on top of the base 1.
supported horizontally. The bar 9 in this embodiment is a fixed base member fixed to the base 1.

A base plate 10 that moves up and down is provided and a heat block 4 is attached. A vertical guide shaft 11 is installed on the movable base plate 10.

Although two guide shafts 11 appear in FIG. 3,
In this example, one guide shaft 11 (four in total) is installed near each of the four corners of the rectangular vertically movable base plate 10.

A vertical guide tube 12 is integrally connected to the guide bar 9, and the guide shaft 11 is slidably inserted thereinto,
Parallel movement in the vertical direction is guided while the movable base plate 10 is supported horizontally.

A cylinder 13 is provided to drive the movable base plate 10 up and down, and has a cylinder body 13a fixed to the bar 9 and a piston rod 13b fixed to the movable base plate 10.

A ring-shaped knob 14 is slidably fitted onto the portion of the guide shaft 11 that projects upward from the guide tube 12, and a retaining washer 15 is attached with a bolt 16.

FIG. 4 shows a perspective view of the guide shaft 11, the guide tube 12, and the vicinity of the knob 14.

A plurality of adjustment holes 17a, 17b, 17c, 17 with different depths are provided on the upper surface of the guide tube 12.
d and 17e are provided. In this embodiment according to the prior application, the adjustment plate 18 having the adjustment holes described above is attached to the upper end surface of the guide tube 12.

The plurality of adjustment holes 17a to 17e are provided on a circular arc S concentric with the guide shaft 11. r is the radius of the arc S mentioned above.

A guide shaft 1 is attached to the bottom surface of the ring-shaped knob 14.
A pin 19 is installed vertically at a distance r from the axis of the pin 1. However, in the present invention, vertical and horizontal mean perpendicular and parallel to the base 1, and have nothing to do with the attitude with respect to the earth.

With the above configuration, when the knob 14 is turned by hand, the adjustment pin 19 draws an arc with a radius r, and can be made to face any one of the plurality of adjustment holes 17a to 17e.

In FIG. 3, the head chamber 13 of the cylinder 13
If c is kept open to the atmosphere, the movable base plate 10 to which the heat block is attached will descend under its own weight. At this time, pressurized air may be communicated to the cylinder bottom chamber 13d to urge the movable base plate 10 to descend.

In this figure, the adjustment pin 19 fits into the adjustment hole 17b and abuts the bottom thereof. Therefore, the lowering of the movable base plate 10 is prevented by the contact between the adjustment pin 19 and the bottom of the adjustment hole 17b. Therefore, the vertical position of the movable base plate 10 (and the vertical position of the heat block 4 attached thereto) is determined by the depth of the adjustment hole.

To change the height of the heat block 4, pressurized air is supplied to the cylinder head chamber 13c of the cylinder 13 to raise the movable base plate 10. Along with this, the guide shaft 11 and the retaining washer 15 also rise. In this state, lift the knob 14 with your fingertips, turn it, and insert the adjustment pin 19 into one of the multiple adjustment holes.
(holes other than 17b among 17a to 17e) are fitted to release the pressure in the cylinder head chamber 13c, and the movable base 10 is lowered.

The above operation does not require any special tools or measuring instruments and can be performed quickly and easily. On top of that,
The height of the heat block 4 is accurately regulated according to the depth of the adjustment hole.

[Problem that the invention attempts to solve]

As explained above, according to the adjustment device of the prior application, the height of the heat block can be quickly and easily adjusted accurately without requiring a large force or using separate tools or measuring instruments. Excellent practical effects can be obtained. However, as a result of repeated practical tests and research using the device of the prior application, the present inventor encountered the following technical problem. That is, in the example shown in FIG. 3, the shuttle rails 2 and the heat blocks 4 are provided in four rows, so if it is desired to accurately adjust the parallelism and spacing between these two members, the adjusting means must be moved to Y as shown in the figure. Two adjustment means must be provided in parallel in the axial direction, and a plurality of adjustment means must also be provided in a direction perpendicular to the paper plane (X-axis direction) in FIG. 3.

Providing such a large number of adjustment means would require a lot of adjustment work and would complicate the structure, so it is desirable to be able to perform precise adjustment with a single adjustment device. To this end, it is sufficient to provide an adjusting device along the vertical axis zz, which is approximately in the center (does not have to be exactly at the center) in both the X-axis direction and the Y-axis direction. However, in the actual preheating mechanism, z-z near the center
In many cases, there are other attached devices near the shaft, making it difficult to provide a member for manual operation.

The present invention was devised in view of the above circumstances, and without sacrificing the advantage of the device of the previous application, which is that “quick and accurate adjustment is possible without the need for tools or instruments,” it also allows one adjustment device to be placed near the center. The present invention is intended to provide a height adjusting device for a heat block in which a manual operation member can be disposed around the heat block.

[Summary of the idea]

In order to achieve the above object, the adjusting device of the present invention has an IC preheating mechanism in which a heat block is supported so as to face a chute that slides and transports an IC and maintains a predetermined clearance with respect to the IC. The chute is fixed to a fixed member, a guide shaft is fixed to the heat block, a bearing member for slidably supporting the guide shaft is attached to the fixed member, and a movable base is fixed to the guide shaft. Attaching the original gear to the moving base and providing manual rotation means for the original gear, and
A receiving gear is rotatably locked relative to the fixed member and sliding in the thrust direction is supported, and the receiving gear is meshed with the original gear, and the shaft of the receiving gear is connected to the moving base. on the surface where the side face of the received gear and the surface of the moving base face each other, along an arc centered on the gear axis on one of the facing faces. , while installing a plurality of adjustable legs having different lengths,
a contact portion is provided on the other of the opposing surfaces;
The abutting portion is configured to face and abut one of the plurality of adjusting legs as the receiving gear rotates, and further, the movable base is moved in a direction in which the abutting portion is pressed by the adjusting leg. It is characterized by providing a biasing spring means.

[Example of idea]

FIG. 1 is a sectional view of one embodiment of the present invention taken along the Z-X plane.

2 is a shuttle rail, 3 is an example of an IC, and 4 is a heat block.

For ease of reading, the components attached to the fixed member (not shown) are hatched. For more information,
Hatching is attached to the member whose movement in the Z-axis direction is restricted relative to the fixed member. Therefore, members that are rotatable around the Z-axis but do not move in the Z-axis direction are marked with hatching.

Members without hatching are members that can move in the Z-axis direction.

Further, for ease of understanding the operation, boundary lines of component parts of integrally connected members are omitted.

In this embodiment, the shoot rail 2 is arranged vertically, but in order to facilitate correspondence with the device of the prior application (FIG. 3), the shoot rail 2 is drawn horizontally. That is, the first device of this embodiment
The figure is set up with the Z-Y plane horizontal and the X axis vertical.

The shoot rail 2 and the fixed base 21 are fixed members in the Z-axis direction.

A pair of guide tubes 22 are installed on the fixed base 21, each of which supports a guide shaft 23 in a slidable manner.

A heat block 4 is fixed to one end of the guide shaft 23, and a moving base 24 is fixed to the other end. The moving base 24 in this example has a frame-like structure having a pair of parallel plate-like parts 24a and 24b.

The receiving gear shaft 25 is rotatably attached to the fixed base 21 while restraining movement in the Z-axis direction,
This received gear shaft 25 is connected to the plate-shaped portion 24 of the moving base 24.
b and a receiving gear 26 at its tip.
to fix.

The original gear 27 is rotatably supported on the plate-shaped portion 24b of the movable base 24.

The manual drive shaft 29 having a handle 28 attached thereto is rotatably and slidably supported by penetrating the movable base plate-shaped portion 24a and coaxially opposing the base gear 27.

A detachable engagement means is provided on the surface where the original gear 27 and the manual drive shaft 29 face each other. In this example, an engagement hole 30 and an engagement pin 31 are provided in each member.

On the other hand, the portion V where the receiving gear 26 and the plate-shaped portion 24b face each other is an improved adjustment means shown in FIG. 4 in the previous application, and a detailed perspective view of this V portion is shown in FIG. Shown below.

An abutment seat 49 is fixed to the side surface (lower surface in the figure) of the receiving gear 26, and adjustment legs 47a to 47e having different lengths are installed on the upper surface of the plate member 24b. S is a circular arc concentric with the gear shaft 25 and having a radius r, and the adjusting legs 47a to 47e are arranged along this circular arc.

As shown in FIG. 1, a coil spring 32 is compressed and interposed between the fixed base 21 and the movable base 24, so that the movable base 24 is moved upward in the figure (that is, the adjustable legs 47a to 47d relative to the abutment seat 49). (in the direction of bringing the ends of either of them into contact).

A coil spring 33 biases the engagement pin 31 in a direction to remove it from the engagement hole 30. It is convenient for this coil spring 33 to be weaker than the coil spring 32 described above.

The central axis z'- of the received gear 26 and coaxial 25
z' is also for the X-axis direction of the shoot rail 2,
Also in the Y-axis direction, they are arranged so as to be approximately in the center. However, as is clear from the above configuration,
The manual drive shaft 29 is spaced apart from the z'-z' axis and
Even if there is an obstacle in the portion 34 on the z'-z' axis, it will not interfere with it.

To adjust the height H of the heat block using the device of this embodiment (Fig. 1), use the handle 2.
After applying hand force to 8 and pressing it in the direction of arrow A,
Turn this.

When a force is applied in the direction of arrow A, the engagement pin 31 first
and the engagement hole 30 fit together, and rotation can be transmitted.

When further force is applied in the direction of arrow A, the moving base 24
is pushed downward in the figure, the heat block 4 moves in the same direction, and the height H temporarily decreases (almost to zero). Along with this, the abutting seat 49 is attached to the adjustable leg 47.
Separate from a to 47e.

When the handle 28 is turned, the original gear 27 and the receiving gear 2
When the abutment seat 49 rotates via the handle 6 and the corresponding abutment seat 49 is opposed to one of the plurality of adjusting legs 47b to 47d having different lengths and the handle 28 is released, the action of the coil spring 32 is activated. Move base 2 with
4, and the heat block 4 is pushed upward in the figure and stopped by contact between the abutment seat 49 and the adjustment leg (any one of 47b to 47d), and the height dimension H
is regulated.

FIG. 6A shows the adjustable leg 49 and the abutting seat 47b.
This is an explanatory diagram drawn by extracting and drawing, and each member is integrally formed with a male thread for mounting. When implementing the present invention, the method for attaching these members is not limited to screws, and any known technique can be applied.

The abutment seat 49 of this embodiment has a smooth abutment surface 49a, and abuts against the tip of the adjustment leg 47b.

FIG. 6B shows an embodiment different from the above, in which the abutment surface 49b of the abutment seat 49' is formed in a counterbore shape.
According to this embodiment, the state in which both members are brought into contact is automatically maintained, and there is no risk of them coming off.

FIG. 6C shows a further different embodiment, in which the abutment seat 4
An engagement hole 49c is provided in the contact surface of the 9'', and an engagement protrusion _47b-1 is provided at the tip of the adjustment leg 47b.
Even with this configuration, the same anti-removal effect as in the embodiment shown in FIG. 6B can be obtained.

FIG. 7 shows an improved example of the embodiment shown in FIG. 6C, in which an engagement hole 49c' is provided in the receiving gear 26, and an engagement protrusion _47c-1 is provided at the tip of each adjustment leg (for example, 47c). . In this way, the peripheral portion D of the engagement hole 49c' is made to act as an abutting portion. In the case of this embodiment, the adjusting legs (47d, 47e in FIG. 7) that are longer than the adjusting leg (47c in the state of FIG. 7) directly facing the contact portion D and the receiving gear 26
The relief hole 26a has a radius r to avoid interference with the
It is provided along the arc S of. This example (7th
Figure) has a simple configuration and is highly practical.

Engagement hole 49' and escape hole 2 illustrated in FIG.
It is also possible to provide the adjustment legs 6a on the movable base side and the adjustment legs 47a to 47e on the receiving gear 26 side.

[Effect of idea]

As detailed above, according to the present invention, the height of the heat block can be adjusted quickly and accurately without using tools or instruments, and moreover, the height adjustment device can be adjusted in the X-axis direction. In addition, the manual operation member can be provided near the center of each of the two in the Y-axis direction, and the manual operation member can be provided at the periphery (avoiding the center).

[Brief explanation of the drawing]

FIG. 1 is a front view of one embodiment of the present invention, and indicates that hatched members are restrained in the Z-axis direction. FIG. 2 is an explanatory diagram of a conventional heat block height adjustment device. FIG. 3 is a partially sectional front view of the heat block height adjusting device of the earlier application, and FIG. 4 is a perspective view of the main parts of the earlier application. Fifth
The figure is a partially sectional perspective view of the vicinity of the V section of the embodiment (FIG. 1). FIGS. 6 and 7 are explanatory diagrams showing various configuration examples of the contact portion and the adjustable leg. 1...Base, 2...Shoot, 3...IC,
4...Heat block, 5...Side plate,
6...Atsupa base, 6a...Cam follower, 7
... Eccentric cam, 8 ... Support column, 9 ... Bar as a fixed base member, 10 ... Base plate that moves up and down, 11 ... Guide shaft, 12 ... Guide tube, 13
... Cylinder, 14 ... Ring-shaped knob, 15 ...
Removal prevention washer, 17a to 17e... Multiple adjustment holes with different depths, 21... Fixed base, 23... Guide shaft, 24... Moving base, 26... Receiving gear, 2
7... Original gear, 29... Manual drive shaft, 30... Engagement hole, 31... Engagement pin, 47a to 47e... Multiple adjustment legs with different lengths, 49, 49', 4
9″...Abutting seat.

Claims (1)

[Scope of utility model registration request] In an IC preheating mechanism, a heat block is supported so as to face a chute that slides and transports an IC and maintains a predetermined clearance with respect to the IC, and the chute is fixed to a fixing member and guided to the heat block. Fixing the shaft and attaching a bearing member that slidably supports the guide shaft to a fixed member, fixing a movable base to the guide shaft, attaching a base gear to the movable base, and manually rotating the base gear. means for supporting the receiving gear by locking sliding in the thrust direction so as to be rotatable with respect to the fixed member, and meshing the receiving gear with the original gear; The shaft is slidably passed through the movable base, and on the surface where the side surface of the received gear and the surface of the movable base face each other, the gear shaft is centered on one of the facing surfaces. A plurality of adjustable legs having different lengths are installed along the circular arc, and an abutting portion is provided on the other of the opposing surfaces, and as the receiving gear rotates, the abutting legs The movable base is configured such that the movable base is opposed to one of the plurality of adjusting legs, and further includes spring means for biasing the movable base in a direction in which the abutting portion is pressed by the adjusting leg. Heat block height adjustment device.