JP2839478B2 - Switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a damper for opening and closing an opening / closing body such as a heavy lid, so that the opening / closing angle of the opening / closing body can be made large while limiting the operating direction of the damper. The present invention relates to an opening and closing device that can easily open and close an opening and closing body.

[0002]

2. Description of the Related Art In order to allow an operator to easily open and close an opening and closing body such as a heavy lid, an opening and closing mechanism using a damper to balance the weight is generally used. I have.

FIG. 6 is a perspective view showing the whole of a conventionally used reflow soldering apparatus as an example of an apparatus having an opening / closing body. The reflow soldering device 1
For example, there is an apparatus for mounting a not-shown electronic component and heating a printed wiring board, which is a work to be heated, to which solder has been supplied in advance to a portion to be soldered, and melting the solder to perform soldering.

[0004] Therefore, the reflow soldering apparatus 1 has a furnace body 2 for performing a heat treatment. Although not shown, a heater for heating the printed wiring board with a hot wire, a heater for blowing hot air, a fan, and the like are provided in the furnace body 2. Have. The transport conveyor 3 is a transport unit that transports the printed wiring board into the furnace body 2 from the entrance 4 and unloads the printed wiring board from the exit 5.

Further, in order to facilitate maintenance work of the reflow soldering apparatus 1, the furnace body 2 is configured to be openable and closable so that maintenance work in the furnace body 2 can be performed. In the example of FIG. 6, the furnace body 2 is configured to be able to open and close and expand vertically by using the hinge 6 as a fulcrum of rotation and deployment. Therefore, the furnace body 2 is divided into an upper furnace body 2A as an opening / closing body and a lower furnace body 2B as a fixed body, and a housing 7 covering the furnace body 2 also serves as an opening / closing body. The upper housing 7A is divided into a lower housing 7B as a fixed body. Further, a handle 8 for opening and closing the upper housing 7A is provided on the upper housing 7A.

FIGS. 7 and 8 show an example of a conventional opening / closing mechanism used in the reflow soldering apparatus 1 shown in FIG. 6. FIG. 7 shows an upper housing 7A and an upper furnace body 2A open. FIG. 8 is a front sectional view showing the state, and FIG. 8 is a front sectional view showing the closed state of FIG.

That is, the furnace body 2 is divided into an upper furnace body 2A and a lower furnace body 2B, and the upper furnace body 2A opens and closes like a lid. The housing 7 is also divided into an upper housing 7A and a lower housing 7B, and the upper furnace body 2A and the upper housing 7A are integrally formed so as to open and close together. I have. Of course, the furnace body 2 and the housing 7 are assembled using a frame (not shown) of the reflow soldering apparatus 1 as a skeleton.

Then, the upper casing 7A and the upper furnace body 2A
A hinge 6 is provided at a rotation base at one end to serve as an axis of rotation / expansion, and a pivot 12A for supporting one end of a damper 11 is provided at a rotation tip at the other end to be rotatable. Fulcrum. On the other hand, the other end of the damper 11 is a fulcrum that is supported by a support shaft 12B provided on the lower housing 7B and is rotatable.

The opening / closing device thus constructed opens when the damper 11 is extended, as indicated by the arrow in FIG. 7, and closes as shown in FIG.

[0010]

Problems to be Solved by the Invention FIGS. 6, 7 and 8
In the reflow soldering apparatus 1 exemplified in (1), the damper 11 cannot be provided at the position indicated by the part A or B in FIG. 7 because of the furnace body 2 and the conveyor 3. That is, the furnace body 2
Gap on the front side between the housing and the housing 7, that is, the gap d _{1 on} the right side in the figure.
The damper 11 must be accommodated and provided at the position of.

In order to make the reflow soldering apparatus 1 compact and to realize a compact reflow soldering apparatus 1, it is not desirable to make the gaps d ₁ and d ₂ between the furnace body 2 and the housing 7 large. For this purpose, if the opening / closing angle θ _{1 is} to be increased by using a damper 11 having a long length to extend, that is, as shown in FIG.
If you open the A and upper furnace body 2A to the position of two-dot chain line, the damper 11 can not secure a large opening angle theta ₁ so would run into the furnace body 7.

It is an object of the present invention to increase the opening / closing angle of the lid by increasing the inclination angle of the damper even when the change in the inclination angle when the damper operates in a narrow place cannot be made large. It is an object of the present invention to provide a switchgear that can be used. As a result, an object of the present invention is to realize a switchgear that is excellent in handling operability and maintainability with a compact body.

[0013]

SUMMARY OF THE INVENTION A plurality of dampers are connected in a cascade by relaying a slider moving along a guide rail, and one end of the dampers connected in a cascade assists opening and closing of the opening / closing body. And the other end to the fixed body.

Accordingly, the slider, which is the connection point of the dampers connected in tandem by opening and closing of the opening / closing body, moves along the guide rail, so that each damper expands / contracts, and one of these dampers expands / contracts. Can expand and amplify the amount of expansion and contraction of other dampers without hindering expansion and contraction of other dampers.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The switchgear of the present invention can be implemented in the following modes.

That is, a plurality of dampers are connected in tandem by relaying a slider that moves along the guide rail, and one end of the dampers connected in cascade is connected to a support shaft of an upper casing which is an opening / closing body. The other end is connected to a support shaft of a lower housing which is a fixed body.

Thus, the sliders at which the dampers are connected in tandem move along the guide rails, and the expansion and contraction of each damper does not interfere with the expansion and contraction of other dampers. Then, the expansion and contraction amounts of the other dampers are mutually expanded and amplified. Further, since the moving direction of the tandem connection point, that is, the movement accompanying the expansion and contraction of the damper, is determined by the guide direction of the guide rail, it can be arranged in a limited narrow space.

[0018]

Next, a specific example of the switchgear according to the present invention will be described with reference to examples.

FIGS. 1 and 2 show an embodiment of the present invention. FIG. 1 is a front sectional view showing a state in which an upper casing and an upper furnace body of a reflow soldering apparatus are open, and FIG. FIG.
It is a front sectional view showing the closed state. In these figures, the same reference numerals as those in FIG. 7 indicate the same parts.

That is, this embodiment is a diagram showing an example in which the opening / closing device of the present invention is used in the reflow soldering apparatus 1 described in its entirety in FIG. The reflow soldering apparatus 1 is divided into upper and lower parts so that the housing 7 and the furnace body 2 can be opened and closed in the same manner as in the related art.
Each is fixed to the same frame. The upper housing 7A and the upper furnace body 2A are connected to the lower housing 7B and the lower furnace body 2B via a hinge 6 so as to be openable and closable.

Also in the present invention, as in FIG. 6, the transfer conveyor 3 for transferring the furnace body 2 and a work to be heated such as a printed wiring board (not shown) passes through the inside of the housing 7.
The carry-in port 4 side and the carry-out port 5 of the reflow soldering apparatus 1
Opening / closing devices cannot be provided on both side surfaces. Further, in order to make the reflow soldering apparatus 1 compact, the space between the furnace body 2 and the housing 7 (front side and back side).
Is narrow, specifically, about 10 cm.

Therefore, as illustrated in FIG. 1, a guide rail 21 and a slider 22 that slides on the guide rail 21 are provided in a narrow space between the furnace body 2 and the housing 7. As the guide rail 21 and the slider 22, those referred to by trade names such as “slide guide” and “slide table” can be used. In addition, various things can be used, such as one in which a bushing or a linear motion bearing or the like is slidably fitted to the guide rod.

As shown in FIG. 1, the guide rail 21 is provided in a space on the front side of the reflow soldering apparatus 1, that is, in a gap between the furnace body 2 and the housing 7, and its guide direction is It is set vertically.

Then, two dampers 23A and 23B are connected in tandem as connection points for relaying the slider 22 which slides and moves along the guide rail 21.

The upper damper 23 of the slider 22
One end 23Aa of A is connected to a frame (not shown) for fixing the upper housing 7A and the upper furnace body 2A by providing a support shaft 24Aa, and the other end 23Ab is provided to connect the slider 22 to a support shaft 24Ab.

The lower damper 23B of the slider 22
One end 23Ba is provided with a support shaft 24Ba connected to the slider 22, and the other end 23Bb is connected to the lower housing 7B and the lower furnace body 2.
A support shaft 24Bb is provided and connected to a frame (not shown) for fixing B.

Next, the shapes of the guide rail 21 and the slider 22 will be described in detail.

FIG. 3 is an enlarged perspective view showing the detailed shape of the guide rail 21 of FIG. 1, and the same reference numerals as those in FIG. 1 indicate the same parts.

In FIG. 3, the base 3 of the guide rail 21
1, a ridge 32 is formed in the longitudinal direction.
The slider 22 has a recessed groove 33 slidably engaged with the slider 22. 1, the upper damper 23A is rotatably mounted on the support shaft 24Ab, and the lower damper 23B is rotatably mounted on the support shaft 24Ba.

With the above construction, as shown in FIGS. 1 and 2, the upper housing 7A and the upper furnace body 2B of the reflow soldering apparatus 1 (integrated by a frame not shown) are handled by the handle 8. by a double damper 23A lifted upward, 23B is extended, this time the slider 22 is moved upward along the guide rails 21, opening the upper housing 7A and the upper furnace body 2A at an angle theta _2. The angle theta ₂ is much larger than the angle theta ₁ illustrated in FIG.

Next, when the upper casing 7A and the upper furnace body 2A are lowered downward by the handle 8, the dampers 23A and 23B are shortened. At this time, the slider 22 moves downward along the guide rail 21, and the upper casing 7A and the upper furnace body 2A are moved downward. The body 7A and the upper furnace body 2A can be closed.

As described above, each of the dampers 23A and 23B is connected with the slider 22 guided by the guide rail 21 as a connection point.
Are connected in tandem, the expansion / contraction amount is approximately doubled, and the expansion / contraction direction is limited to a direction that does not hinder, so that an opening / closing device having a large opening / closing amount and opening / closing angle can be realized even in a small space.

FIGS. 4A and 4B are views showing other shapes of the guide rail. FIG. 4A is a perspective view, and FIG.
FIG. 4A is a partially broken plan view, and the same reference numerals as those in FIG. 1 indicate the same parts.

4 (a) and 4 (b), reference numeral 41 denotes a guide rail made of a long member having a U-shaped cross section, and a predetermined gap 43 is formed by opposing the groove 42 so that the groove 42 is on the inner side.
A slider 44 having a size that does not contact the guide rail 41 is inserted into the gap 43, and bearings 4 are provided on both surfaces of the slider 44, respectively.
The bearing 45 rolls in the groove 42 of the guide rail 41 by the vertical movement of the slider 44.

Further, dampers 23A and 23B are attached to the slider 44 as in FIG.

In the embodiment shown in FIGS. 1 to 3, the guide direction of the guide rail 21 is linear.
, An arcuate guide rail may be used.

FIG. 5 is a structural view showing another shape of the guide rail 31 of FIG. 1, and the same reference numerals as those in FIG. 1 indicate the same parts. The configuration example shown in FIG. 5 is effective when the space in which the dampers 23A and 23B and the guide rail 51 can be installed is bent. That is, an arcuate guide rail 51 as shown in FIG. 5 may be used.

In FIG. 5, an arc-shaped guide rail 5 is shown.
Slider 52 that engages with curve 1 and slides along an arc-shaped ridge 53 formed on guide rail 51.
Is provided.

The slider 52 is formed with a not-shown groove which engages with the same curvature as the ridge 53.

When the slider 52 slides on the guide rail 51 due to the extension of the dampers 23A and 23B provided with the slider 52 as a connection point, each damper 23
A, 23B and the slider 52 are at the positions shown by the two-dot chain lines, and can open the upper case 7A and the upper furnace body 2A shown in FIG. 1, for example.

In the above embodiment, two dampers are connected in tandem. However, three or more dampers can be connected in tandem through a slider.

[0042]

As described above, according to the present invention, a plurality of dampers are connected in tandem by relaying a slider moving along a guide rail, and one end of the dampers connected in cascade is connected to an opening / closing body. Since the other end is connected to the fixed body, the amount of expansion and contraction of the damper can be increased. Also,
Even when the change in the inclination angle when the damper operates in a narrow gap cannot be made large, the opening and closing angle of the lid can be made large by effectively increasing the inclination angle of the damper. Further, a damper can be provided in a bent space, and the opening and closing direction of the lid can be freely set.

As a result, the opening / closing device of the present invention can be mounted on a compact body, and the operability and maintenance of the body can be remarkably improved.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a front sectional view showing a state in which an upper housing and an upper furnace body of a reflow soldering apparatus are open.

FIG. 2 is a front sectional view showing a closed state of FIG. 1;

FIG. 3 is an enlarged perspective view showing a detailed shape of a guide rail in FIG. 1;

4 is a view showing another shape of the guide rail of FIG. 3, wherein FIG. 4 (a) is a perspective view and FIG. 4 (b) is a partially broken plan view of FIG. 4 (a).

FIG. 5 is a configuration diagram showing another shape of the guide rail of FIG. 1;

FIG. 6 is a perspective view showing the entire configuration of a conventionally used reflow soldering apparatus.

FIG. 7 shows an example of a conventional opening / closing mechanism used in a reflow soldering apparatus, and FIG. 7 is a front sectional view showing a state in which an upper housing and an upper furnace body are open.

FIG. 8 is a front sectional view showing a closed state of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reflow soldering apparatus 2 Furnace body 2A Upper furnace body 2B Lower furnace body 6 Hinge 7 Housing 7A Upper housing 7B Lower housing 8 Handle 21 Guide rail 22 Slider 23 Damper 23A Upper damper 23A Lower damper 24 Support shaft 31 Base 32 Convex ridge 33 Groove

Claims (1)

(57) [Claims] 1. A plurality of dampers are connected in tandem via a slider that moves along a guide rail, one end of the dampers connected in cascade is connected to an opening / closing body, and the other end is connected to a fixed body. And a switchgear characterized by that.