JPH078479B2 - Bread cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is to reciprocate a cutting blade in the lengthwise direction to provide bread products, flour products such as castella and cake, paste products such as cheese and ham, or Relates to a reciprocating cutting device for cutting vegetables and the like (hereinafter referred to as bread).

[Conventional technology]

As a cake cutting device, a reciprocating cutting device for cutting a cake by horizontally reciprocating a tool rest provided with a plurality of cutting blades in parallel with each other by a crank mechanism is known. (Japanese Patent Publication No. 56-28678).

[Problems to be Solved by the Invention]

The cutting blade of the above-described conventional cutting device has a moving speed that decreases in the vicinity of the turning point (near the top dead center and the bottom dead center of the crank) and stops for a moment at the turning point. However, there is a problem in that the sharpness is changed from the sharp cut to the push-cut state or a state close to that, the sharpness is impaired, the cut surface is not smooth, and unevenness is generated to reduce the commercial value.

The present invention provides a cutting device which has a sharp cutting blade, can clean a cutting surface to enhance the commercial value, and can reduce the vibration of an object to be cut to smoothly and safely. With the goal.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a lower frame, an upper frame mounted on the lower frame via a vibration isolating member, and a cutting tool in which a cutting blade is mounted with its cutting edge facing downward. A stand, a first guide mechanism provided on the upper frame for guiding the tool rest in a downwardly convex arc shape, a balance stand arranged vertically facing the tool rest, and provided on the upper frame A second guide mechanism for guiding the balance base upward in a convex arc shape, and the tool base and the balance base individually reciprocally moved along the respective guide mechanisms in synchronization with each other in the length direction of the cutting blade. The driving device is provided with a driving member, and a receiving member provided on the lower frame for supporting an object to be cut such as a pan on the cutting moving surface of the cutting blade.

[Action]

When the drive device is actuated, the tool post reciprocates in the length direction of the cutting blade, but at this time, the cutting blade makes a reciprocating circular arc motion convex in the direction of the cutting edge, that is, downward by the action of the first guide mechanism. . In the above operating state, when the object to be cut such as a pan is raised together with the receiving member toward the cutting edge of the cutting blade, the cutting blade changes the moving direction at one turning point and slightly moves from the turning point. By the way, after touching the object to be cut and cutting a part of the object to be cut, the object is retreated upward at a speed faster than that of the object to be cut, and the blade tip is separated from the cutting point of the object to reach the other turning point. And change the direction of movement again,
In the same manner as above, the object to be cut is cut.

During the cutting operation of the turret, the balance base is synchronized with the turret by the drive device and moves upside down with the turret by the action of the second guide mechanism to absorb the vertical inertia of the turret.

Further, the vibration isolator absorbs the vibration on the upper frame side. Therefore, the receiving member provided on the lower frame fixedly supports the object to be cut without being affected by the vibration of the upper frame, and the cutting is smoothly performed.

〔Example〕

1 to 8 show an embodiment of a cutting device for bread or the like according to the present invention. This cutting device for bread or the like has a plurality of cutting blades 1 and the cutting blades 1 are parallel to each other. A tool rest 2 that supports the tool rest 2, a drive device 3 that reciprocates the tool rest 2 in the lengthwise direction of the cutting blade 1, a guide mechanism 4 that guides the tool rest 2, and a pan or the like for the cutting blade 1. The main component is a transfer device 5 that moves the workpiece W.

As shown in FIG. 3, the cutting blade 1 has fastening projections 6, 7 on both ends.
And one end of which is fitted into a slit 8a formed in one supporting member 8 of the tool rest 2 so that the fastening projection 6 is fitted into the groove 9a of the fastening fitting 9 and the other end of the tool rest 2 is supported. The other end is fitted into the slit 10a formed in the member 10, the fixing projection 7 is fitted into the groove 11a of the spring plate 11 and is detachably attached to the tool rest 2. The supporting member 8 is a frame 12
The other supporting member 10 is fixed to the frame body 12 by the fixing bolt 15 so as to be adjustable in the left and right direction in FIG. Frame 12 above
Are two pairs of front and rear cam followers 16a, 16b on the side (Fig. 4)
Is integrally attached to a movable member 17 provided with, and the movable member 17 and the supporting members 8 and 10 constitute the tool rest 2.

The guide mechanism (first guide mechanism) 4 is composed of an arc-shaped cam, and is convex in the direction of the cutting edge 1a of the cutting blade 1, that is, downwardly convex (see FIGS. 5 and 8), inside the upper frame 18. Attached to the front, rear, left and right, a pair of upper and lower cam followers 16a, 16b
Is configured to touch the upper guide surface 4a and the lower guide surface 4b to guide the tool rest 2, and the cutting blade 1 is reciprocally moved in a circular arc.

Here, the shapes of the upper guide surface 4a and the lower guide surface 4b of the guide mechanism 4 will be described. The upper guide surface 4a is formed as an arc surface having a radius Ra, and the lower guide surface 4b is formed as an upper surface. The distance D (= r of the cam followers 16a, 16b from the center Oa of the guide surface 4a of
a + rb + t) Radius Rb (= Ra around the lowered position Ob
-Ra-rb) is formed on the arc surface.

However, ra is the radius of the cam follower 16a, rb is the cam follower 1
The radius of 6b, t is the thickness of the cam 4 at the perpendicular position from the center Oa to the cam 4.

In the above configuration, the center of the cam follower 16a indicated by the two-dot chain line in FIG. 5 is: a The center of the cam follower 16b indicated by the two-dot chain line in FIG. 5: b The guide surface 4b below and the cam follower immediately below the position Oa, Ob. Contact point: c angle c, Oa, a = angle c, Ob, b, (distance Oa, c) = Ra + D- (ra + rb) Rb = (distance Oa, c) -D = Ra + D- (ra + rb) -D = Ra- (ra + rb) In a quadrangle connecting points Oa, Ob, a, b, (distance Oa, a) = Ra-ra (distance Ob, b) = Rb + rb = Ra- (ra + rb) + rb = Ra-ra ∴ (Distance Oa, a) = (Distance Ob, b) (Distance Oa, Ob) = (Distance a, b) = D The line connecting points Oa, Ob and the line connecting points a, b are parallel,
The pair of upper and lower cam followers 16a, 16b are always arranged in the guide mechanism 4
Correctly contact the upper and lower guide surfaces 4a, 4b to move the turret 2.
Keep your posture horizontal. As shown in FIG. 2, the guide mechanism 4 is fixedly provided on one side (four in total).

Further, the drive device 3 includes a continuously variable transmission motor 20 provided on the lower frame (19), a crankshaft 24 (the first shaft 20 connected to the motor 20 via a pulley 21, a transmission belt 22 and a pulley 23). 7) and a crank rod 25 having one end attached to the crank shaft 24. Then, the other end of the crank rod 25 is connected to the horizontal pin 26 (Fig. 6).
27 and a vertical pin 28 are connected to the movable member 17 of the tool rest 2, and the rotation of the crankshaft 24 by the motor 20 moves the cutting blade 1 through the tool rest 2 in the longitudinal direction thereof. ing.

Furthermore, in the transfer device 5, the receiving member 32 for the object W to be cut and the object W to be cut on the receiving member 32 are mounted on the lift table 31 that is moved up and down by the cylinder 30 along the corner guide 29 fixed to the lower frame 19. A pressing member 33 for pressing is attached so that the workpiece W can be raised toward the cutting blade 1. The cylinder 30 is attached to the lower frame 19 as shown in FIG.

The receiving member 32 and the pressing member 33 are wire-shaped or strip-shaped, and a plurality of the receiving members 32 and the pressing member 33 are arranged side by side with a moving gap of the cutting blade 1 (not shown in FIG. 1). 32 is fixed to the lift base 31, and the latter pressing member 33 is pivotally supported by the lift base 31 via a rotary shaft 34 so as to be tilted up and down. It is urged to rotate clockwise in the figure. An operating lever 36 is attached to the rotating shaft 34. When the push rod 37 provided on the lower frame 19 is pushed to the right in FIG. 1 against the elasticity of the return spring 38, the operating lever 36 is pushed. Is pressed and the pressing member 33 is rotated by the rotation shaft 34.
1 is tilted to the left in FIG. 1 so that the object W to be cut can be placed on the receiving member 32 from the insertion port 39 formed between the upper frame 18 and the lower frame 19. .

In addition to the above, this cutting device includes a balance base 40 that absorbs inertia (secondary vibration) with respect to the vertical movement of the tool rest 2.
(FIGS. 4 and 8) are provided.

The balance base 40 is formed in a frame shape whose plane shape is almost the same as that of the tool rest 2. The balance base 40 has the same shape as the cams 4 below the cams 4 and is provided with an upward convex shape. A pair of upper and lower cam followers 43, 43 are brought into contact with the upper surface and the lower surface of the cam (second guide mechanism) 42, and are provided so as to be connected to the vertical pin 28. The vertical inertia (secondary) of the vertically moving tool rest 2 is absorbed by moving it upside down with respect to the tool rest 2.

Reference numeral 53 in FIG. 6 is a spring for smoothing the vertical movement of the tool rest 2 and the balance base 40, and reference numerals 54 in FIGS. 1 and 2 are provided on the side plate 55 of the lift base 31 for cutting. A pressing spring for pressing the side end surface of the object W, reference numeral 61 in FIG. 1 is a vibration isolating member made of rubber or the same material as the rubber that supports the upper frame 18 on the lower frame 19.

Next, the operation of the cutting device for bread or the like according to the present invention configured as described above will be described.

From the state shown in FIG. 1, the push rod 37 is pushed to the right, the pressing member 33 is tilted to the left, and the object W to be cut is inserted from the insertion port 39.
When the pressing member 33 is returned to its original position, the pressing member 33 is erected by the urging mechanism 35 and presses and stabilizes the workpiece W on the receiving member 32.

After the above operation is completed, the drive device 3 is operated to cause the cutting blade 1 mounted on the tool rest 2 to move downwardly in a reciprocating circular arc along the guide mechanism 4 while extending the cylinder 30 to extend the object to be cut. W is raised toward the cutting blade 1. When the cutting blade 1 passes the turning point, it immediately starts descending, contacts the object W to be cut and cuts a part thereof, and then rises faster than the rising of the object W, resulting in a cut portion of the object W to be cut. It separates from, reaches the other turning point, and descends again to cut the workpiece W. For this reason, the cutting blade 1 retracts upward when the moving speed is zero or a slow speed close to this, does not directly participate in the cutting away from the cutting site of the workpiece W, and only when the moving speed is high. The object W to be cut comes into contact with the cutting site and is cut, and the entire object W is cut by pulling. The cut object W is taken out from above the cutting blade 1. However, since the cutting edge 1a of the cutting blade 1 faces downward, there is no danger and it is safe.

In the above, the balance base 40 moves upside down with respect to the tool rest 2 to prevent vertical vibration, and the vibration isolator 61 absorbs vertical vibration of the upper frame 18. Therefore, the lower frame
The vibration of the upper frame 18 is less likely to be transmitted to the receiving member 32 provided at 19, and the workpiece W is fixedly supported correctly in a predetermined state and smoothly cut.

FIG. 9 shows an example in which the three cam followers 16 are guided by the cam 4. In this case, since the member 56 provided with the cam followers 16 changes its posture with movement, the tool rest 2 is The front and rear members 56, 56 are erected by a pivot 57.

FIG. 10 shows a guide mechanism using a swing link 58. The tool rest 2 is supported by the lower end of the swing link 58 and is connected to the crank rod 25 via links 59, 60. . Reference numeral 62 in this figure is a crosshead for guiding the link 59, and in the first embodiment as well, the horizontal axis portion of the joint 27 is lengthened so that the portion is guided by the crosshead. A smooth operation is performed.

Although the balance stand is omitted in FIGS. 9 and 10, as in the case of the first embodiment, the balance stand is arranged so as to face up and down with respect to the tool rest 2, and is synchronized with the tool rest 2 by the driving device. Needless to say, it can be moved back and forth convexly downward.

It should be noted that although the one shown in the drawing is configured to raise the workpiece W while reciprocating the cutting blade 1 in the horizontal direction,
The object to be cut is not limited to this, and the object to be cut W is fixed at a predetermined position, and the cutting blade 1 is reciprocally moved in the length direction with respect to the object to be cut, and is moved in the direction of the cutting edge 1a to cut the object to be cut. You can also choose to do so. Further, the guide mechanism (cam) in the drawing is formed in an accurate arc centered on one point, but it may be an arc centered on two or more points. A heater is usually attached to the cutting blade. Further, in the above, an example in which the retreating (raising) speed of the cutting blade 1 in the vicinity of the turning point is set to be higher than the transfer (raising) speed of the workpiece W has been described. Even when the transfer speed of the object to be cut W is the same, the push-through can be avoided, and thus the object to be cut W can be cut in such a manner.

Furthermore, instead of the cylinder 30 of the transfer device 5, a ball screw or a chain rotated by a motor can be used to move the lifting table 31, and the transfer device is not limited to that shown in the drawing. Needless to say, the holding mechanism for the object W to be cut, the fixing mechanism for the cutting blade, and the like are not limited to those shown in the figures, but may be arbitrary.

〔The invention's effect〕

As described above, the cutting device for bread and the like according to the present invention is provided with a lower frame, an upper frame mounted on the lower frame via a vibration isolating member, and a cutting blade mounted with its cutting edge facing downward. And a first guide mechanism provided on the upper frame for guiding the tool rest in a downwardly convex arc shape, and a balance stand arranged vertically facing the tool rest, and an upper part. A second guide mechanism provided on the frame for guiding the balance base in an upwardly convex arc shape, and the tool rest and the balance base individually synchronized with each other in the lengthwise direction of the cutting blade along the guide mechanisms. And a transfer device for reciprocating the cutting blade and a receiving member provided on the lower frame to support the cutting moving surface of the cutting blade such as a pan, and the transfer speed of the cutting blade with respect to the cutting edge of the cutting blade. Appropriate Cutting blade, in the vicinity of the turning point of the reciprocating movement, away from the cleavage site of object to be cut and retracted,
In addition, when the moving speed is sufficiently high after passing through the turning point, it is possible to contact the cutting site of the object to be cut again and cut it off, so that the cutting blade exerts a sharp sharpness and cleans the cutting surface. , The product value can be increased.

In addition, the balance stand moves upside down with the turret to prevent vertical vibration, so by increasing the reciprocating movement speed of the cutting blade, the cutting edge's effective cutting edge angle is reduced and its sharpness is improved. You can cut things quickly and cleanly.

Moreover, since the anti-vibration member absorbs the vibration of the upper frame, the cut object supported by the receiving member on the lower frame side does not vibrate, and in this respect also, the cutting can be performed smoothly and neatly. It has the effect of suppressing the generation of chips. Moreover, since the best sharpness is maintained for a long period of time, it is not necessary to frequently grind the cutting blade, and the cutting work can be performed efficiently. In addition, the tool rest is convex and moves downward with the cutting edge facing, which is safe without danger.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional front view of essential parts of a cutting device for bread and the like according to the present invention, FIG. 2 is a plan view, FIG. 3 is a sectional view showing a mounting state of a cutting blade, and FIG. 4 is a tool rest and balance. FIG. 2 is a side view of the guide mechanism of the platform, which is partially broken in the direction of the arrow in FIG. 2 (IV-IV), and FIG.
FIG. 6 is a detailed sectional view of a VI portion in FIG. 1, showing a connection state of a tool rest and a balance stand, and FIG. 7 is a partially cutaway plan view showing a relationship between a crankshaft and gears, and FIG. Is an exploded external view showing the relationship between the movable member, the balance base, and the first and second guide mechanisms, FIG. 9 is a front view showing another embodiment of the cam follower, and FIG. 10 is another embodiment of the guide mechanism. FIG. DESCRIPTION OF SYMBOLS 1 ... Cutting blade, 1a ... Blade edge 2 ... Tool rest, 3 ... Drive device 4 ... Cam (first guide mechanism), 18 ... Upper frame 19 ... Lower frame, 32 ... Receiving member 40 ... Balance base 42 ... Cam (second) Guide mechanism) 58 ... Swing link (guide mechanism) 61 ... Anti-vibration member, W ... Object to be cut

Claims (1)

[Claims] 1. A lower frame (19), an upper frame (18) mounted on the lower frame (19) via a vibration isolating member (61), and a cutting blade (1) having a cutting edge (1a). ) Attached downwards, and a first guide mechanism (4) provided on the upper frame (18) for guiding the tool rest (2) in a downward convex arc shape. A balance stand (40) arranged vertically facing the tool rest (2), and a second guide provided on the upper frame (18) for guiding the balance stand (40) in an upward convex arc shape. The guide mechanism (42), the tool rest (2), and the balance stand (40) reciprocate along the respective guide mechanisms (4, 42) in synchronization with each other in the longitudinal direction of the cutting blade (1). Drive device to move (3)
And a receiving member (32) provided on the lower frame (19) for supporting an object to be cut (W) such as bread on the cutting movement surface of the cutting blade (1), and cutting of bread or the like. apparatus.