JPS6227956B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an offset device for material feed in a bandsaw machine.

It can be said that band saw machines with an automatic material feed mechanism are known, in which the reciprocating movement of the material conveyor table feeds the material into the rotating band saw, cuts it, and repeats the process of cutting again after the backward movement. The cut end surface of the material placed on the conveyor table comes into contact with the back of the band saw during the return movement, resulting in unsightly scratches on the cut end surface. Such a problem is particularly problematic when the material is a frozen food such as a meat loaf, because it occurs noticeably and reduces the commercial value.

Furthermore, if the loading position of the material changes incorrectly on the conveyor table due to vibration or impact, the back of the band saw will be pushed by the material during the return movement, causing the band saw to come off the pulley forward. There is a danger that it will come out, and it will also harm work efficiency. Not only is the band saw easily bent, but especially when the material is frozen food, the band saw is more likely to come off the pulley due to the adhesion of chips containing oil, fat, and moisture, and the band saw is more likely to come off the pulley. Since the food is often sliced into thin slices, the above problem occurs frequently.

Therefore, the traveling trajectory of the conveyor table is changed so that when the conveyor table moves backward, it moves away from the band saw by a certain distance, and when it moves forward for cutting, it returns to its original position, approaching the band saw. It is necessary to do so.

The present invention aims to provide a material feeding offset device that meets these demands, and its specific configuration will be described in detail based on an illustrated embodiment in which the device is applied to a band saw for cutting frozen foods. In Figures 1 to 3, which schematically show the entire band saw machine, A is the machine casing of the band saw machine, in addition to the drive pulley storage chamber 1 and driven pulley storage chamber 2 that can be opened and closed, the right side of the drive pulley storage chamber 1 It also has a storage chamber 3 for the feed drive means adjacent to the . 4 is a driven pulley suspended in the driven pulley storage chamber 2, 5 and 6 are a driving pulley that is suspended in the driving pulley storage chamber 1, and a motor installed to rotate this. An endless band saw 7 is hung on both pulleys 4 and 5 which are vertically opposed to each other so as to circulate, and the saw teeth on the front side of the band saw cut the material M to a constant thickness W. There is. 8 is a receiving plate for the material M; 9 is an operating handle for adjusting the elevation of the driven pulley 4 in order to engage/unload and tension the band saw 7; and 10 is a flexible wheel for changing the installation position of the machine casing A. .

Reference numeral 11 designates a motor exclusively for feeding installed in the storage chamber 3 of the feed drive means, and 12 designates a gearbox, which incorporates a reduction transmission mechanism using a bevel gear (not shown) or the like. Reference numeral 13 denotes a crank arm that performs crank motion in a horizontal state on the upper surface of the machine casing A, and is driven by the motor 11.
The tip of the crank arm 13 is pivotally connected to a material conveying table B, and the conveying table B linearly reciprocates in the front-back direction so that the upper surface of the machine casing A is parallel to the plate surface of the band saw 7. I'm starting to exercise more. This conveyance table B is composed of an assembly of a slide frame plate 14 and a material mounting table 15 integrally attached to the upper surface of the slide frame plate 14 on a lid. In this case, as suggested from the figure, the table 15 has an L-shape when viewed from the left and right sides, and is attached to the frame plate 14 so as to be freely insertable and removable from the right side. Therefore, by screwing back and removing the fixing bolt 6, the frame plate 14
Cleaning the inside of the table 15 and cleaning the table 1
5 itself can be easily replaced.
The arm length of the crank arm 13 is adjustable, but the reference numerals are omitted.

Reference numeral 17 denotes a slide guide shaft for reciprocating the conveyance platform B, and is installed horizontally near the right end of the machine casing A so as to run in the front-rear direction. 18 fixedly supports the shaft 17,
A pair of columns C and D stand up on the top surface of the machine casing A, and they are also a pair of left and right slide guide rails.
The left side near the bandsaw 7 is fixed to the top surface of the machine casing A as a free rail C that is simply U-shaped. In other words, due to its U-shaped cross-sectional shape, the later-described rollers of the conveyor table B that engage with it and roll can move freely left and right without being restrained. For this reason, it is called free rail. On the left side of the transport platform B, which corresponds to this free rail C,
A support leg 19 is fixedly suspended from the lower surface of the slide frame board 14, and a free rail C is attached to the lower end of the support leg 19.
A roller 20 that engages with is pivotally supported. 21
is a skirt plate suspended from the left end of the frame board 14 so as to cover the rail C, and serves to prevent chips and the like from entering.

On the other hand, the rail on the right side far from the band saw 7 serves as an offset rail D for the material conveyance table B, allowing the conveyance table B to be moved away from the band saw 7 by a certain distance S only during its return movement, and conversely has a cutting effect. During the forward movement, the locus of movement is changed so as to approach the bandsaw 7 and then return, the details of which will be described later. On the right side of the conveyance table B corresponding to this offset rail D, a large support leg 22 of a special form is fixedly suspended from the slide frame plate 14, and a stay 23 that continuously projects from the support leg 22 has a Above crank arm 1
3 are connected by a pivot bolt 24.

Furthermore, as the details are clear from the enlarged views of FIGS. 4 to 10, 25 is a groove opened approximately at the center of the large supporting leg 22 in order to allow the guide shaft 17 to escape. 17 penetrates along the front-rear direction. Reference numeral 26 denotes a bearing cylinder loosely connected to the shaft 17, and connecting pieces 27 hanging integrally from both front and rear ends thereof are connected to the support leg 22 itself by a pair of front and rear pivot pins 28, respectively. As a result, the bearing tube 26 swings about the shaft 17 in a so-called oscillating manner, and the conveyance table B can move laterally to the left and right relative to this.
29 is a supporting leg 22 facing into the groove 25.
By selectively pressing both bolts 29 against the central bearing cylinder 26 of the shaft 17, the horizontal vibration of the conveyor table B with respect to the shaft 17 is suppressed. It has become possible to regulate it in subsequent states.

In other words, the transport platform B uses the shaft 17 as a pivot point.
When the carriage B moves laterally to the left position, the bolt 29 on the right side protruding from the support leg 22 hits the shaft 17 as shown in FIG. This time, the bolt 29 on the left side hits the shaft 17, and care has been taken so that the bolt 29 can be stably restrained at all times without wobbling or other wobbling in each state after lateral movement. In this case, in relation to changing the amount of horizontal lateral movement of the conveyor table B (the distance S from the band saw 7), the position at which it hits the shaft 17 can be adjusted by advancing and retracting the bolt 29. Of course it is possible.

Reference numeral 30 denotes a mounting cylinder that continuously hangs down from a substantially central portion of the support leg 22, and a roller 31 that engages with the offset rail D is pivotally supported on this mounting cylinder.
Engagement roller 20 with the above-mentioned free rail C
However, as shown in the figure, this roller 31 is adapted to roll around a vertical axis, whereas the roller 31 rolls around a horizontal axis. 32
Similarly, numeral 33 is a spring receiving pin that is suspended from the middle of the support leg 22, and 33 is a cam wall plate that is vertically L-shaped in cross section and is fixedly suspended from the right end of the support leg 22, and has a substantially triangular wedge shape when viewed from above. It has an inclined cam surface 34 generated from the upright wall plate surface.

Further, 35 is an opening/closing wall plate adjacent to the front part of the cam wall plate 33 that is also suspended from the support leg 22, and also has a vertical L-shape in cross section, and is attached to the lower surface of the support leg 22. Piece 36 and pivot pin 3
7, it is rotatably mounted around the vertical axis. This opening/closing wall board 35 has an elongated, generally triangular shape in plan view, with an inclined end surface 38 that corresponds to and comes into close contact with the inclined cam surface 34 of the cam wall board 33. By coming into close contact with each other, the upright wall plate surfaces of both wall plates 33 and 35 are continuous with each other without gaps or steps, and are aligned flush as a whole. This is intended to allow the rollers of the intermediate switching rail in the offset rail D, which will be described later, to roll smoothly.

39 is a tension coil spring that elastically biases the opening/closing wall plate 35, which can rotate around the pivot pin 37, so that it is always in a closed state with the cam wall plate 33;
Spring receiving pin 32 hanging from the support leg 22
and a portion near the tip of the opening/closing wall plate 35. Therefore, it cannot be easily recognized from the outside world. The inclined cam surface 34 of the cam wall plate 33 has a certain length L, and faces as an upright wall plate surface that blocks the bending internal space of the opening/closing wall plate 35, so that it can smoothly roll against the switching rail. At this time, the opening/closing wall plate 35 is forcibly opened from the tightly closed state with the cam wall plate 33 by the rollers against the spring 39. As shown in FIG. 10, it can be rotated.

As is clear from FIG. 10, the offset rail D includes a fixed rail 40 that faces each other to form a grooved cam surface, and a switching rail 41 that is movable in the groove width direction (left and right lateral directions) inside the fixed rail 40. It consists of an assembly and extends in the front and back direction on the upper surface of the machine casing A. Reference numeral 42 denotes a mounting bracket for the fixed rail 40, which is fixed to the upper surface of the machine casing A. 43 is a seat plate for correctly moving the switching rail 41 laterally, and is integrated so as to cross the space below the fixed rail 40. Reference numeral 44 designates a horizontal branch plate that is fixedly integrated with the switching rail 41 so as to extend across the same direction to the right side, and the cam wall plate 33 and the opening/closing wall plate 3 of the support leg 22 are attached to the protruding tip of the horizontal branch plate.
A roller 45 that can roll while engaging with the upright wall plate surface of No. 5 is installed. Reference numeral 46 denotes a tension coil spring connected midway between the branch plate 44 and the fixed rail 40 so as to cross the groove of the rail 40, thereby causing the switching rail 41 to move as shown by the chain line in FIG. In addition, it is always urged to be drawn to the left side position within the groove in the fixed rail 40.

Corresponding to the relationship between the material conveyance table B and the band saw 7, the roller 31 hanging down from the support leg 22 of the conveyance table B is adapted to roll in the groove of the offset rail D. Therefore, the state in which the switching rail 41 has moved to the above-mentioned left side position in the groove of the fixed rail 40 means the state in which the carrier B has been moved away from the band saw 7 by a certain distance S, and vice versa. The state in which the rail 41 has moved to the right side indicated by the solid line in FIG. 10 also means the state in which the conveyor table B has approached the band saw 7.
As suggested from the figure, the switching rail 41 forms a grooved cam surface that is continuous with the fixed rail 40, and the band width of the switching rail 41 is equal to the above-mentioned spacing distance S. Incidentally, the distance S is approximately 10 mm. It is preferable that the switching rail 41 is made of synthetic resin to prevent the unnatural sound of metal touches. Then, by the crank motion of the crank arm 13, the conveyor table B is moved to the machine casing A.
It is reciprocated along the upper surface in the front and back direction, and when it moves backward, it travels on a trajectory approaching the band saw 7, and the material M is subjected to the cutting action of the saw teeth. During the backward movement, the carrier B returns along a trajectory that moves away from the band saw 7.

Next, the operation will be explained based on FIGS. 11 and 12. The solid line in FIG. The rollers 45 of the switching rail 41 are engaged against the tension coil spring 46 of the switching rail 41 on the flush wall surface that is continuous with the opening/closing wall board 35, so that the switching rail 41 is drawn to the right position in the groove in the fixed rail 40. Therefore, transport platform B
can be moved forward as a trajectory approaching the band saw 7.

In that case, the rollers 45 of the switching rail 41 will roll while engaging with the upright wall plate surface, but when the rollers 45 of the switching rail 41 reach the midway stage of their forward movement, their engagement will occur as shown by the chain line in FIG. The agreement will be canceled. However, at this time, the roller 31 hanging down from the conveyor table B is in a state of rolling engagement with the switching rail 41, killing the tensile action of the spring 46, so it continues to move smoothly, and eventually As soon as the forward movement end stage (backward movement start stage) is reached,
As shown by the chain line in FIG. 12, the tensile force of the spring 46 automatically and instantaneously draws the switching rail 41 to the left position within the groove in the fixed rail 40. Therefore, the conveyance table B can now be moved back along a trajectory that moves away from the band saw 7 by a fixed distance S.

Therefore, once the backward motion is started, the rollers 31 of the conveyance platform B are in a rolling state of engagement with the switching rail 41 until it reaches the intermediate stage, but eventually the engagement occurs as shown by the solid line in FIG. 12. will be lifted. From this point on, the rollers 45 of the switching rail 41 engage with the inclined cam surface 34 of the cam wall plate 33 hanging down from the conveyor table B, so to speak, and roll on the cam surface 34. In that case, the opening/closing wall plate 35 is rotated open by the rollers 45 while resisting the coil spring 39 thereof.
As the rollers 45 ride up the inclined cam surface 34, the switching rail 41 is drawn to the right position in the groove of the fixed rail 40 by the tensile force of the coil spring 46, and automatically as shown in FIG. The machine is returned to the forward movement starting state shown by the solid line, and preparations are made for the material cutting operation again. As already mentioned, the free rail C does not impose any restrictions on the horizontal and horizontal movement of the conveyance platform B, which corresponds to the conversion effect of the offset rail D.

As described above, in the present invention, in a band saw machine in which the band saw 7 automatically cuts the material M when the material conveying table B, which slides back and forth on the machine casing A by a crank motion, moves forward, the conveying table A slide guide rail D for offset is installed on the machine casing A to create a groove cam surface, which moves B closer to the band saw 7 and moves it away from the band saw 7 by a certain distance S during the backward movement. Fixed rail 40
and a switching rail 41 inserted into the groove so as to be movable laterally in the width direction, and a roller 45 is attached to a branch plate 44 extending from the middle of the switching rail 41 so as to cross the fixed rail 40. A spring 4 is installed between the branch plate 44 and the fixed rail 40 to constantly draw the switching rail 41 to one position in the groove.
At the same time, a roller 31 that removably engages with the switching rail 41 and rolls in a groove, and a cam wall plate 33 that removably engages with the roller 45 are suspended from the conveyor table B. When the conveyance table B moves forward, the rollers 45 and the cam wall plate 33 are engaged with each other while resisting the tensile force of the spring 46, and the switching rail 41 is drawn to the other position in the groove in the fixed rail 40. Similarly, during the return movement, the switching rail 41 is pulled back to one position within the groove by the tensile force of the spring 46, so the automatic mechanical problem mentioned above is completely resolved. This invention can be said to be particularly effective when applied to a band saw machine that thinly slices frozen foods such as meat chunks.

[Brief explanation of the drawing]

The figures relate to an embodiment of the present invention applied to a band saw machine for cutting frozen foods. Figure 1 is a front view showing the overall outline, Figures 2 and 3 are a side view and a plan view, and Figure 4 is an embodiment of the present invention. Figures 5 and 6 are partially cutaway left and right side views of Figure 4, and Figures 7 and 8 are X-X lines of Figure 5. 9 is a cross-sectional front view of the offset state corresponding to FIG. 8, FIG. 10 is an enlarged plan view with the offset rail extracted, and FIGS. 11 and 12 are both sectional views along the Y-Y line. FIG. 3 is a schematic plan view for explaining the action. A...Machine housing, B...Material transport table, C...Free rail, D...Offset rail, M...Material, S...Interval distance, 7...Band saw, 13...Crank arm, 14... ...Slide frame board, 15...Material placement table, 17...Guide shaft, 1
9, 22... Support leg, 20, 31... Roller,
33...Cam wall plate, 35...Opening/closing wall plate, 39,4
6...Tension coil spring, 40...Fixed rail, 4
1...Switching rail, 44...branch board, 45...roller.

Claims (1)

[Claims] 1. In a band saw machine that automatically cuts a material M with a bandsaw 7 when a material carrier B that slides back and forth on a machine casing A by a crank motion moves forward, the carrier B approaches the band saw 7 during the forward movement. , a slide guide rail D for offset which converts the slide guide rail D to be moved away from the band saw 7 by a fixed distance S during the backward movement, and a fixed rail 40 that is installed on the machine casing A of the band saw machine to generate a groove cam; A switching rail 41 inserted into the groove so as to be movable laterally in the width direction
A roller 45 is attached to a branch plate 44 extending from the middle of the switching rail 41 so as to cross the fixed rail 40, and the switching rail 41 is attached between the branch plate 44 and the fixed rail 40. A spring 46 is connected to the spring 46 that constantly pulls the slider toward one side of the groove, and a roller 31 that detachably engages with the switching rail 41 and rolls in the groove, and a cam wall that detachably engages with the roller 45. The plate 33 is suspended from the conveyor table B, and when the conveyor table B moves forward, the rollers 45 and the cam wall plate 33 are engaged with each other while resisting the tensile force of the spring 46, so that the switching rail 41 is connected to the fixed rail 40. This offset device for feeding a material in a bandsaw machine is characterized in that it is configured to pull the material toward the other side of the groove, and also return the switching rail 41 to one side of the groove in a drawn manner by the tensile force of a spring 46 during backward movement.