JPH0454469Y2 - - Google Patents

Description

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

[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.

[Problem that the invention attempts to solve]

In the above-mentioned conventional adjustment device (FIG. 2), the upper base 6 moves up and down steplessly 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.

This idea was created in view of the above circumstances.
The object of the present invention is to provide a device that can quickly and easily accurately adjust the height of a heat block without requiring a large force or using any special tools or measuring instruments.

[Means for solving problems]

In order to achieve the above object, the adjusting device of the present invention is provided with a vertically movable base plate to which a heat block is fixed, a fixed base member is provided above the vertically movable base, and a vertically movable base member is provided above the vertically movable base plate. At the same time as installing a guide shaft, a vertical guide tube is fixed to a fixed base member, and both guide members are slidably fitted, and a ring-shaped knob is attached to the part where the guide shaft projects above the guide tube. is slidably fitted on the outside to provide a retaining means, and the guide tube is fitted on either the upper surface of the guide cylinder and the lower surface of the annular knob along an arc centered on the guide shaft. A plurality of adjustable legs having different lengths are installed, and an abutting part is provided on one of the two surfaces, and the abutting part is attached to the plurality of adjusting legs by turning a ring-shaped knob. It is characterized in that it is configured so that it can come into contact with any arbitrary leg within the base, and is further provided with a driving means for raising and lowering the vertically movable base.

〔Example〕

Next, one embodiment of the present invention will be described with reference to FIGS. 1 and 3.

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. 1,
In this embodiment, a rectangular vertically movable base 10 is used.
One guide shaft 11 (four in total) is installed near each of the four corners.

A vertical guide tube 12 is integrally connected to the guide bar 9, and the guide shaft 11 is slidably inserted therethrough,
The movable base plate 10 is guided in parallel movement in the vertical direction while being 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 10.

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

A perspective view of the guide shaft 11, the guide tube 12, and the vicinity of the knob 14 is shown in FIG.

A plurality of adjustment legs 17a, 17b, 17c, 17 with different lengths are provided on the upper surface of the guide tube 12.
Plant d and 17e. In this embodiment, the adjustment plate 18 having the above adjustment legs implanted therein is attached to the upper end surface of the guide cylinder 12 with screws 18a.

The plurality of adjustment legs 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.
The abutting seat 19 is fixed at a distance r from the axis of the holder 1. However, in this invention, vertical and horizontal mean perpendicular and parallel to the base 1,
It has nothing to do with your attitude towards the earth.

With the above configuration, when the knob 14 is turned by hand, the abutting seat 19 draws an arc with a radius r, and can be opposed to any one of the plurality of adjusting legs 17a to 17e.

In FIG. 1, 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 FIG. 1, the abutting seat 19 is the adjustable leg 17b.
is in contact with. Therefore, the movement base 10 is prevented from descending by the abutment between the abutment seat 19 and the adjustment leg 17b. Therefore, the moving base 10
The vertical position of the heat block 4 (and the vertical position of the heat block 4 attached thereto) is determined by the length of the adjusting leg.

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 and turn it to move the abutting seat 19 to one of the plurality of adjustable legs.
(legs other than 17b among legs 17a to 17e), pressurization of the cylinder head chamber 13c is released, 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.

As is clear from the structure and function described above, the same functions and effects can be obtained even if the knob 14 and the adjustment plate 18 are replaced and assembled in the above embodiment.

That is, the same operation and effect can be obtained by providing an adjustment leg on the lower surface of the knob 14 and fixing the abutment seat 19 on the upper surface of the adjustment plate 18.

FIG. 4A is an explanatory view depicting the adjustment leg 17c and the abutting seat 19 facing each other, and each member is integrally formed with a male screw for attachment. 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 19 of this embodiment has a smooth abutment surface 19a, and abuts against the tip of the adjustment leg 17c.

FIG. 4B shows a different embodiment from the above, in which the contact surface 19b of the adjustable leg 19' 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. 4C shows a further different embodiment, in which the abutment seat 1
An engagement hole 19c is provided in the contact surface of the 9'', and an engagement protrusion _17C-1 is provided at the tip of the adjustment leg 17c'. Even with this structure, the same effect as in the embodiment shown in FIG. 4B is obtained. Provides anti-removal effect.

FIG. 5 shows an improved example of the embodiment of FIG. 4C, in which an engagement hole 14a is bored in the knob 14',
The lower surface of 4' (specifically, the D portion around the engagement hole 14a) is used as an abutting portion. In the case of this embodiment, the relief hole 14b is formed along an arc S' with a radius r to avoid interference with the adjustable leg (any one of the adjustable legs 17a to 17d) that is in contact with it. Set it up. This embodiment (FIG. 5) has a simple configuration and is highly practical.

The engagement hole and relief hole shown in the embodiment of FIG. 5 are provided in the adjustment plate 18, and the adjustment legs 17a to 17
It is also possible to install e in the knob 14,
This is a configuration that falls within the technical scope of the invention of the present application.

[Effect of idea]

As detailed above, according to the adjusting device of the present invention, the height of the heat block can be quickly and easily accurately adjusted without requiring a large force or using separate tools or measuring instruments. .

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional view of a conventional heat block height adjustment device, Fig. 2 is a partial cross-sectional front view of an embodiment of the present invention, and Fig. 3 is a perspective view with a part of the main part cut away. It is a diagram. FIGS. 4 and 5 are explanatory diagrams of various configuration examples regarding the abutting seat and the adjustable legs. 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, 14a...
...Engagement hole, 14b...Escape hole, 15...Preventing washer, 17a to 17e...Multiple adjustment legs with different lengths, 17 _C-1 ...Engagement protrusion, 18...Adjustment plate,
18a...Mounting bolt, 19...Abutting seat, 19a
...Abutting surface, 19b...Counterbore-shaped abutting surface, 19
c...Engagement hole.

Claims (1)

[Scope of utility model registration request] Above the chute that slides and transports the IC,
In the IC preheating mechanism in which a heat block is provided to maintain a predetermined clearance with respect to the IC, a vertically movable base plate to which the heat block is fixed is provided, a fixed base member is provided above the vertically movable base plate, and the above-mentioned vertically movable base plate is provided. A vertical guide shaft is planted on the movable base plate, and a vertical guide cylinder is fixed to the fixed base member, and both guide members are slidably fitted, so that the guide shaft projects above the guide cylinder. A ring-shaped knob is slidably fitted onto the outer part of the ring-shaped knob to prevent it from coming off, and a guide shaft is attached to one of the upper surface of the guide tube and the lower surface of the ring-shaped knob. A plurality of adjustment legs having different lengths are installed along a central circular arc, and a contact portion is provided on the other of the two surfaces, and a ring-shaped knob is turned to adjust the contact portion. A heat block height adjusting device, characterized in that the heat block is configured such that it can be brought into contact with any one of the plurality of adjusting legs, and is further provided with driving means for raising and lowering the vertically movable base. .