JPH0840526A - Chip conveyor - Google Patents

Abstract

PURPOSE:To provide a chip conveyor in which a frame can be constructed of thin plate material to make its weight lighter, and a casing can be easily manufactured. CONSTITUTION:A casing 1 is formed by joining a plurality of frames 27, 33 or the like through spot welding. The first and the second rotating body 4, 5 are provided in the casing 1, and an endless carrying belt 11 is spread over between the first and the second rotating body 4, 5. The carrying belt 11 is formed so that its circulating motion may be caused by the rotary drive of a geared motor 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip conveyor for conveying cutting chips discharged from a machine tool.

[0002]

2. Description of the Related Art Generally, a chip conveyer for conveying cutting chips discharged from a machine tool has an endless conveyer belt which is provided between guide members arranged at regular intervals in a casing. By rotating one of the guide members, the conveyor belt is rotated, and the cutting waste discharged from the machine tool onto the belt is conveyed.

The casing is composed of a frame made of a plurality of metal materials. Conventionally, for example, the edge of one frame is abutted against another frame, and the entire length of the abutted portion is partially or partially arc welded. Was applied and joined.

[0004]

However, in the above-mentioned arc welding, if the melted welding rod has a low penetration into the frame, the strength of the joint becomes insufficient. Therefore, the plate material forming the frame needs to have a certain thickness or more in order to deepen the penetration, and even if the frame is made of a thin plate material in order to reduce the weight of the chip conveyor, the point of the fusion as described above is required. Since that, its weight reduction was limited.

Arc welding is also performed by continuously applying heat along the abutting portion of the frame. Therefore, when the plate thickness is thin, so-called welding deformation such as wavy deformation of the frame due to thermal expansion easily occurs.

Further, in the arc welding, in order to keep the joining strength constant, it is necessary to make the molten state of the welding rod in the joining portion uniform, which requires skill.
Moreover, since the welding rod is continuously melted along the joint portion, it takes a long time to perform the joining work, and the arc is a dangerous work during welding.

The present invention has been made by paying attention to the problems existing in the above-mentioned prior art, and the purpose thereof is to construct a frame with a thin plate material to reduce the weight and to manufacture a casing. It is to provide an easy chip conveyor.

[0008]

In order to achieve the above object, the invention of claim 1 is a chip conveyor in which a casing is formed by joining a plurality of frames by spot welding.

According to the second aspect of the present invention, a flange is provided at an edge portion of at least one of the adjacent frames, and the overlapping portion of the flange of the one frame and the other frame is joined by spot welding. is there.

According to the third aspect of the present invention, a support frame for supporting the conveyor belt is disposed in the casing by spot welding the overlapping portion with the casing.

[0011]

According to the first aspect of the present invention having the above structure, a plurality of frames are joined by spot welding to form a casing. Unlike arc welding, spot welding does not need to consider melting of the welding rod and can be joined even when the plate thickness of the frame is thin.

Further, spot welding can be carried out by a simple work of sandwiching the joint portion by means of point electrodes and applying a high voltage momentarily, and since it is sandwiched at points, the influence of the resistance heat is distributed to the surroundings. Therefore, even if the frame is thin, it is possible to prevent the frame from being welded and deformed.

As described above, it is possible to reduce the weight of the chip conveyor by making the frame plate thin. In the invention of claim 2, a flange is provided on at least one of the adjacent frames, and the overlapping portion of the flange and the other frame is welded. Therefore, the stress applied to the casing is dispersed on the contact surface between the flange and the other frame, and the stress is not concentrated on the welded portion. Therefore,
The strength of the casing can be improved.

According to the third aspect of the invention, a support frame for supporting the conveyor belt is joined by spot welding in the casing. Therefore, the plate thickness can be reduced similarly to the frame constituting the casing, which can contribute to the weight reduction of the chip conveyor.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the casing 1 is
A first casing 2 extending in the horizontal direction and having an open upper surface;
The second casing 3 is provided continuously with the first casing 2 and extends obliquely upward. 4 and 5
As shown in FIG. 1, the first and second rotating bodies 4 and 5 as guide members are composed of a pair of sprockets 8 and 9 fixed to both ends of the rotating shafts 6 and 7, respectively. And
A conveyor belt 11 as a conveyor belt is stretched between the first and second rotating bodies 4 and 5.

As shown in FIGS. 1 and 7, a geared motor 17 as a drive device is attached to a side end surface of the second casing 3 via a motor frame 18. The sprocket 19 is attached via a torque limiter 20 to a rotary shaft 7 of the second rotating body 5 which projects to the outside of the casing 1. The sprocket 19 and the sprocket 21 attached to the drive shaft of the geared motor 17 are Are connected via a chain 22.

As shown in FIG. 7, the torque limiter 2 is provided.
Reference numeral 0 denotes a pair of concave clamping metal fittings 23, one clamping metal fitting 23 (upper side in FIG. 7) is fixed to the side surface of the sprocket 19, and the other clamping metal fitting 23 and the other clamping metal fitting 23 are connected by a bolt 24. ing. Then, the contact pressure between the clamp 23 and the rotary shaft 7 is adjusted by the tightening amount of the bolt 24, and the upper limit value of the rotary torque applied to the geared motor 17 is set.

The rotation of the geared motor 17 causes the second rotating body 5 to rotate, and the rotation of the second rotating body 5 causes the conveyor belt 11 to move to the first and second rotating bodies 4,
The shavings and the like on the conveyor belt 11 are conveyed by being circulated between the five.

Further, for example, when the lump-shaped cutting waste is caught between the inner surface of the second casing 3 and the conveyor belt 11 and stays there, the cutting waste becomes a running resistance of the conveyor belt 11, and the second rotating body 5 is moved. The torque for rotating the motor increases, and the geared motor 17 is overloaded. However, in this embodiment, since the torque limiter 20 is interposed between the geared motor 17 and the second rotating body 5, the sprocket 19 slides on the rotating shaft 7 when the rotating torque exceeds a predetermined value. It is possible to release the rotational force of the motor 17 and prevent seizure of the motor 17.

Next, the structure of the casing 1 will be described in detail. As shown in FIG. 2 and FIG. 4, the first casing 2 supports an outer frame 27 that is a box body having upper and right side openings, and is disposed in the outer frame 27 to support the conveyor belt 11. It comprises a support frame 28. Then, the outer frame 27 and the support frame 28
Is formed by bending a plate material made of a metal material. The support frame 28 is made up of a pair having a substantially U-shaped cross section and an inverted U-shaped cross section in FIG. 2, and extends in the same direction as the outer frame 27. Then, the both support frames 28 are arranged so that the openings of the U-shaped recess 29 face each other.
It is joined to the inner wall of the outer frame 27. At this time,
As shown by 100 in FIG. 1, spot welding is performed on the overlapping portion of the concave portion 29 of the support frame 28 and the side wall of the outer frame 27, and this is performed at a plurality of positions in the extending direction of the outer frame 27 as shown in FIG. The outer frame 27 and the support frame 28 are joined together. That is, as shown in FIG. 2, the outer frame 27 and the support frame 28 are overlapped,
The overlapped portion is sandwiched by a pair of dot-shaped electrodes 30 from both outsides, and a high voltage is applied between both electrodes 30, so that the frame 2
Welding is performed by fusing the sandwiched portions with resistance heat generated by themselves. This operation is similarly performed in spot welding at each place described below. In the drawing, 31 is a transformer, 32 is a control device for controlling voltage, and a power supply is connected to the control device 32.

As shown in FIGS. 3 and 5, the second casing 3 includes a pair of side frames 33, an upper frame 34 disposed between the upper ends of the side frames 33, and a lower end of the side frames 33. And a support frame 36 that is provided on the inner wall of the side frame 33 and supports the conveyor belt 11. These frames 33
To 36 are formed by bending a plate material made of a metal material.

The side frame 33 has a shape extending obliquely upward, and a flange 37 formed by being folded back inward is formed at the lower edge of the side frame 33. The upper frame 34 is formed by bending a rectangular plate material in conformity with the shape of the upper edge of the side frame 33. Further, both side portions thereof are folded back upward to form a flange 38 that abuts the side frame 33.
Then, the upper frame 34 is arranged between the inner surfaces of the both side frames 33 so that the flange 38 is on the upper side, and by spot welding as shown by 100 at the overlapping portion between the flange 38 and the upper end of the side frame 33. It is joined.

The lower frame 35 is formed by bending in accordance with the shape of the lower edge of the side frame 33, and both side portions are folded back upward to form flanges 39. Then, the lower frame 35 is arranged so that the flange 39 is on the upper side, and the lower ends of the both side frames 33 are sandwiched by the both flanges 39. Further, support frames 36 having a U-shaped cross section (right side in FIG. 3) and an inverted U-shaped cross section are arranged on the inner surfaces of the lower end portions of the both side frames 33, respectively. The flange 39 of the lower frame 35, the lower end of the side frame 33, and the inner wall surface of the recess 41 of the support frame 36 are overlapped with each other, and the flange 37 of the side frame 33 and both side portions of the lower frame 39 are overlapped with each other. Spot welding (100) is performed at a plurality of positions along the longitudinal direction of the overlapping portion to join the both side frames 33 and the lower frame 35.

Then, as indicated by 100 in the center of FIG. 1, the right end side walls of the outer frame 27 of the first casing 2 are superposed so as to sandwich the left lower end portions of the side frames 33 of the second casing 3. Then, spot welding is performed on the overlapping portion to connect the first and second casings 2 and 3 to each other to form the casing 1. The motor 1
Since a heavy object such as 7 is arranged on the upper portion of the second casing 3, the leg portion 48 supporting the second casing 3 has the lower frame in order to prevent the present chip conveyor from tipping over to the right in FIG. The support frames 28, 3 provided in the casing 1 provided on the lower surface of the casing 35.
The guide rollers 16 of the conveyor belt 11 located on the lower side are placed on the inner bottom surfaces of the recesses 29, 41 of the reference numeral 6, and the guide rollers 16 of the upper conveyor belt 11 are placed on the upper surfaces of the support frames 28, 36. ing. The guide roller 16 of the conveyor belt 11 during the revolving operation of the conveyor belt 11.
Run on the support frames 28 and 36, respectively.

As shown in FIGS. 5 and 6, a pair of through holes 42 is formed on both sides of the upper surface of the upper frame 34, and the through holes 42 project from and retract into the second casing 3. Suspending metal fittings 43 are respectively accommodated as possible. That is, the E-shaped locking metal fitting 44 is fixed to the back surface of the upper frame 34, and the protruding piece 45 at the center thereof is exposed so as to cross the inside of the through hole 42. The hanging metal fitting 43 has a convex outer shape, and a hook-shaped hole 46 for hook is formed at the center thereof. The hanging metal fitting 43 is arranged in each through hole 42 so that the protruding piece 45 of the locking metal fitting 44 laterally passes through the hook hole 46.

When the hanging bracket 43 is pulled upward, the circular portion of the hook hole 46 projects from the upper frame 34 as shown in FIGS. 1 and 6, but the hanging bracket is wider than the through hole 42. The shoulder portion 47 of 43 is brought into contact with the back surface of the locking member 44, and further protrusion is prevented. Conversely, the hanging bracket 43
5, even if it tries to fall into the second casing 3 due to its own weight, as shown in FIG. 5, with the upper end surface of the hanging bracket 43 slightly protruding from the through hole 42, the hook hole of the hanging bracket 43 is formed. The inner edge of the upper portion of 46 is brought into contact with the projecting piece 45 to prevent the hanging fitting 43 from falling into the second casing 3. And, although not shown, the hanging metal fittings 4 at these four places
In the state where 3 is projected, the hook hole 4 of the hanging fitting 43
By hooking a hook such as a hanging wire extending from the crane in each 6, the chip conveyor is lifted and transported. In this way, the hanging bracket 43
Is accommodated in the second casing 3 except when the chip conveyor is being transported, so that the hanging metal fitting 43 does not get in the way.

As described above, in this embodiment, the frames 33 to 35 are joined by spot welding to form the second casing 3, and the first casing 2 and the second casing 3 are also joined by spot welding. are doing. In spot welding, since the superposed frames 27, 33 to 35 are sandwiched by the point electrodes 30 and a voltage is instantaneously applied to perform welding, it is possible to suppress the influence of the resistance heat on the periphery of the welded portion. . Therefore, the frames 27, 33-3
Even if the plate thickness of 5 is thin, the frame 2 is
It is difficult for welding deformation such as 7, 33 to 35 to expand and corrugate.

Further, unlike the arc welding, a welding rod as a joining medium is not required, and therefore, it is not necessary to consider the melting of the melted welding rod.
Even if the plate thickness of ~ 35 is thinned, the bonding strength is not affected.

As described above, the frames 27, 33 to 35
The casing 1 can be welded by spot welding.
It is possible to contribute to the weight reduction of the present chip conveyor by allowing the plate thicknesses of the frames 27 and 33 to 35 constituting the above-mentioned No. 3 to be allowed.

Further, the overlapping portions of the frames 27, 33 to 35 are sandwiched by the electrodes 30, and the frames 27, 33 to 35 can be joined by a simple operation of instantaneously applying a voltage.

Moreover, in the second casing 3, the flanges 37 to 39 are provided on at least one of the adjacent frames 33 to 35, and the flanges 37 to 39 and the other frames 33 to 35 are provided. The overlap was welded. Therefore, the stress applied to the casing 1 is dispersed on the contact surfaces of the flanges 37 to 39 and the frames 33 to 35, and is not concentrated on the welded portion. Therefore, the strength of the casing 1 can be improved.

The support frames 28 and 36 arranged inside the first and second casings 2 and 3 are joined by spot welding. Therefore, the support frame 28,
Welding is possible even if the plate thickness of 36 is reduced, which can contribute to weight reduction of the chip conveyor.

The present invention is not limited to the above-mentioned embodiments, but can be carried out within the scope of the present invention. For example, although the chip conveyor is divided into a horizontal conveying portion (first casing 2) and an inclined conveying portion (second casing 3), the tip conveyor may be changed so that the whole is inclined. good. Further, the horizontal conveyance portion and the inclined conveyance portion may be configured by a combination other than the above embodiment. In this way, the chip conveyor can be arranged according to various installation locations.

The technical ideas other than the claims that can be understood from the above-described embodiments will be described below along with their effects. (1) The chip conveyor according to any one of claims 1 to 3 has a horizontal transfer section 2 and an inclined transfer section 3.

In this way, the horizontal conveyance section 2 and the inclined conveyance section 3 can be combined and arranged at various places. (2) Between the drive device 17 and the conveyor belt 11,
The chip conveyor according to claim 1, wherein a torque limiter 20 is interposed.

By doing so, it is possible to prevent the burn-in due to the overload of the drive unit 17. (3) The torque limiter 20 is sandwiched by the shaft 7 that transmits the driving force of the driving device 17 to the conveyor belt 11, and is sandwiched by the shaft 7 that is driven dynamically by the driving of the driving device 17 with respect to the coaxial shaft 7. The chip conveyor according to (2) above, which is configured to limit the overload of the drive device 17 by adjusting the pressure applied.

In this way, the upper limit value of the load applied to the drive device 17 can be set only by adjusting the clamping pressure on the shaft 7. (4) In the casing 1, a hanging metal fitting 43 is housed so as to be retractable from the upper surface of the casing 1.
The chip conveyor according to any one of 1.

In this way, the hanging metal fitting 43 is housed in the casing 1 except when the chip conveyor is being transported,
It does not interfere with work. (5) A through hole 42 is formed on the upper surface of the casing 1, and a locking piece 45 is provided so as to cross the through hole 42, and the hanging metal fitting 43 has a hook hole 46 portion formed therein. It is configured to be able to project from 42, and the hanging metal fitting 43 has a hole 46 for a hook so that the locking piece 45 extends laterally therethrough.
The chip conveyor according to the above (4), which is arranged in 2.

In this way, the upper edge of the hook hole 46 is brought into contact with the locking piece 45, and the through hole 42 of the hanging fitting 43 is provided.
It is possible to prevent the inward fall.

[0040]

As described above in detail, according to the first aspect of the invention, the chip conveyor can be made lighter by making the frame plate thinner.

According to the invention of claim 2, the strength of the casing can be improved. According to the invention of claim 3, it is possible to contribute to weight reduction of the chip conveyor.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment embodying the present invention and is a side view of a chip conveyor.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a sectional view taken along line BB in FIG. 1;

FIG. 4 is a vertical cross-sectional view of FIG. 1, showing an enlarged view of the first casing.

FIG. 5 is a vertical cross-sectional view of FIG. 1, showing an enlarged view of the second casing.

FIG. 6 is an enlarged perspective view showing a hanging fitting.

FIG. 7 is an enlarged view of the vicinity of the geared motor in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Casing, 11 ... Conveyor belt, 27 ... Outer frame which comprises a casing, 28 ... Support frame which supports a conveyor belt, 30 ... Electrodes for spot welding, 33 ... Side frame which comprises a casing, 34 ... Constitutes a casing Upper frame, 35 ... Lower frame constituting casing, 36 ... Support frame for supporting the conveyor belt, 37 ...
Flange formed on side frame, 38 ... Flange formed on upper frame, 39 ... Flange formed on lower frame, 100 ... Spot welded portion.

Claims (3)

[Claims] 1. A chip conveyor for transporting cutting chips and the like discharged from a machine tool, wherein the casing is formed by joining a plurality of frames by spot welding. 2. The chip according to claim 1, wherein a flange is provided at an edge portion of at least one of the adjacent frames, and the overlapping portion of the flange of the one frame and the other frame is joined by spot welding. Conveyor. 3. The chip conveyor according to claim 1, wherein a support frame that supports the conveyor belt is disposed in the casing by spot welding a portion where the casing overlaps with the casing.