JPH0771799B2 - Guide device for cutting blade in reciprocating cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention cuts bread products, flour products such as castella and cake, paste products such as cheese and ham, or vegetables (hereinafter referred to as bread). The present invention relates to a cutting blade guide device in a reciprocating cutting device.

[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).

The cutting blade of this reciprocating cutting device has a lower moving speed near 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.

In order to solve this problem, the proposer of the present invention has, as shown in FIG. 9, a guide member c provided with three upper and lower cam followers b on a tool rest a to which a cutting blade (not shown) is attached. Is attached via the pivot d, and the cam follower b of the guide member c is guided to the upper and lower surfaces of the arcuate cam e, and the cutting device is projected in the blade tip direction (downward) while keeping the horizontal state. We have developed a reciprocating cutting device that is configured to make a circular arc motion.

[Problems to be solved by the invention]

However, it has been found that the configuration of the guide device has problems that the number of cam followers b used is large, the structure is complicated, and noise is likely to occur.

[Means for solving problems]

The present invention relates to a reciprocating cutting device that cuts an object to be cut such as a bread by reciprocally moving the cutting blade with respect to a frame by a drive device, in one of the frame and the cutting blade, the cutting blade A plurality of cam followers, each of which is composed of two cam followers arranged at required intervals in the direction of the blade edge, and two cam followers of the above cam follower mechanism on the other side of the frame and the cutting blade. The above-mentioned problems are solved by providing a plurality of cams that guide the cutting blade in a reciprocating circular arc motion in the direction of the cutting edge in correspondence with the cam follower mechanism.

[Action]

When the drive device is actuated, the cutting blade reciprocates in the lengthwise direction, and at this time, one cam follower in the blade tip direction of the cutting blade is guided by one guide surface of the cam and the other cam follower is , Guided by the other guide surface of the cam,
By moving relative to the cam, the cutting blade is caused to make a reciprocating circular arc motion that is convex in the direction of the cutting edge. At this time, since the cam follower mechanism composed of two cam followers moves the two cam followers relative to the guide surfaces of the two front and back surfaces of the cam, the cutting blade maintains a predetermined state without changing its posture. Perform an arc motion. Since the number of cam followers constituting the cam follower mechanism is minimized, the operating noise is reduced.

〔Example〕

FIGS. 1 to 8 show a new reciprocating cutting device which employs the guide device of the present invention. This reciprocating cutting device has a plurality of cutting blades 1 and those cutting blades 1 which are parallel to each other. To support the tool rest 2, the drive device 3 for reciprocating the tool rest 2 in the length direction of the cutting blade 1, the guide device A according to the present invention for guiding the tool rest 2, and the cutting blade 1. The main component is a transfer device 5 that moves an object W to be cut such as bread.

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
Is integrally attached to the movable member 17 and
Further, the tool rest 2 is configured with the support members 8 and 10.

The guide device A according to the present invention includes a cam follower mechanism 16 attached to the front and rear of a side portion of the movable member 17, and a convex portion in the direction of the cutting edge 1a of the cutting blade 1, that is, downward (see FIG. 5). A pair of upper and lower cam followers 16a, 16b, which are composed of arcuate cams 4 attached to the front, rear, left and right inside the frame 18 and constitute the cam follower mechanism 16, are brought into contact with the upper guide surface 4a and the lower guide surface 4b of the cam 4. The cutting tool 1 is guided by the cutting tool 1 and the cutting blade 1 is moved back and forth in an arc.

Here, the shapes of the upper guide surface 4a and the lower guide surface 4b of the cam 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. Center of guide surface 4a
From Oa, the distance D (= r _a + r
_b + t) Radius R _b (= R _a −r _a ) centered on the lowered position Ob
It is formed on the arc surface of −r _b ).

Where r _a is the radius of the cam follower 16a and r _b is the cam follower 1
The radius of 6b, t is the thickness of the cam 4 at the perpendicular position from the center O _a to the cam 4.

In the above configuration, the pair of upper and lower cam followers 16a, 16b are
At all times, the cam 4 is moved properly in contact with the upper and lower guide surfaces 4a, 4b to keep the posture of the tool rest 2 horizontal.

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

Furthermore, in the transfer device 5, the receiving member 32 for the object W to be cut is mounted on the lift table 31 which is moved up and down by the cylinder 30 along the corner guides 29 provided on the upper frame 18 and the lower frame 19.
And a pressing member 33 for pressing the cut object W on the receiving member 32 are attached, and the cut object W can be raised toward the cut object 1. The receiving member 32 and the pressing member 33 are wire-shaped or strip-shaped, and the cutting blade 1
A plurality of them are arranged side by side with a moving gap (not shown in FIG. 1). The former receiving member 32 is fixed to the lifting table 31, and the latter holding member 33 is rotated to the lifting table 31. Drive shaft 34
It is rotatably supported axially via and is biased by a biasing mechanism 35 using a spring or the like so as to rotate clockwise in FIG. 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. 1, the pressing member 33 is tilted to the left in FIG. 1 about the rotation shaft 34 as a fulcrum, and the member W to be cut is received from the insertion port 39 formed between the upper frame 18 and the lower frame 19. It is designed to be placed on top of.

In addition to the above, the reciprocating cutting device includes a balance table 40 (fourth table) that absorbs inertia with respect to vertical movement of the tool post 2.
And a balance mechanism 41 (FIG. 7) for absorbing the inertia of the tool rest 2 in the left-right direction and maintaining the balance of the mass of the crank rod 25.

The balance stand 40 has a pair of upper and lower cam followers 43, 43 which are brought into contact with the upper and lower surfaces of a balance cam 42, which is formed under the cams 4 and has the same shape as the cams 4 and has a convex shape. It is provided so as to be connected to the vertical pin 28 and moves upside down with respect to the tool rest 2 to absorb the vertical inertia of the tool rest 2.

On the other hand, the balance mechanism 41 is formed to have the same diameter as the gear 44 attached to the crankshaft 24 and has a balance weight.
A balance gear 46, which is provided with 45 and is meshed with the gear 44.
And a balance weight 47 formed to have the same diameter as the balance gear 46 and a balance gear 48 meshed with the balance gear 46, and a balance weight 49 formed to have a diameter half that of the balance gear 46. A balance gear 50 meshed with the balance gear 46, a balance weight 51 formed to have the same diameter as the balance gear 50 and a balance weight 51, and a balance gear 52 meshed with the balance gear 48. It rotates in synchronism with 24 to absorb the inertia of the tool rest 2 in the left-right direction and maintain the balance of the mass of the crank rod 25. Since the balance mechanism 41 is provided symmetrically with the crank rod 25 as the center, it does not generate a couple.

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 56 in FIG. 1 is a vibration-proof rubber.

Next, the operation of the guide device according to the present invention configured as described above will be described together with the operation of the reciprocating cutting device.

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.

When the above operation is completed, the driving device 3 is operated to reciprocate the cutting blade 1 to the left and right in FIG. 1. At this time, the cam followers 16a, 16b of the tool rest 2 are guided by the guide surface 4a above the cam 4. And the lower guide surface 4b, respectively, to move the cutting blade 1 together with the tool rest 2 to make a downward convex reciprocating arc motion. In this operating state, the cylinder 30 is extended to raise the workpiece W toward the cutting blade 1. When the cutting blade 1 passes the turning point, it immediately starts descending, contacts the workpiece W and cuts a part thereof, and then rises faster than the rising of the workpiece W.
The cutting object W is cut away from the cutting site W, reaches the other turning point, and descends again. Therefore, the cutting blade 1
When the moving speed is zero or a slow speed close to this, the moving object retreats upward, separates from the cutting site of the object W and is not directly involved in cutting, and only when the moving speed is high, the cutting site of the object W is cut. It comes into contact with the object and cuts it.
It will be cut by cutting the whole of. Although the cut pulling material W is taken out from the top of the cutting blade 1, there is no danger because the cutting edge 1a of the cutting blade 1 faces downward, and it is safe.

The upper guide surface 4a and the lower guide surface 4b of the cam 4 of the guide device A shown in the figure are formed in accurate arcs centered on one point, but arcs centered on two or more points, Or 2
It may have a straight line portion centered on a point or more. In the illustrated example, the frame 18 is provided with the cam 4 and the turret 2 is provided with the cam followers 16a, 16b, but the frame 18 is provided with the cam followers 16a, 16b and the turret 2 is provided with the cam 4 respectively. It can also be carried out.
Furthermore, although rollers are the most common cam followers 16a, 16b, they can also be used as slide shoes.

〔The invention's effect〕

As described above, the guide device for the cutting blade in the reciprocating cutting device according to the present invention is a reciprocating device that cuts an object to be cut such as bread by reciprocally moving the cutting blade with respect to the frame by the drive device. In the cutting apparatus, one of the frame and the cutting blade is provided with a plurality of cam follower mechanisms composed of two cam followers arranged at a predetermined interval in the blade tip direction of the cutting blade, and the frame and the cutting blade are provided. On the other hand, a plurality of cams for guiding the two cam followers of the cam follower mechanism to the guide surfaces of the two front and back surfaces to cause the cutting blade to make a reciprocating circular arc motion in the direction of the cutting edge are provided corresponding to the cam follower mechanism, respectively. Since the number of cam followers of the cam follower mechanism corresponding to one cam is a minimum of two, the structure is simple and easy to carry out, and the operation is easy. There is an effect that noise pollution can be prevented without generating a large operation noise at the time.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a reciprocating cutting device equipped with a cutting-blade guiding device according to the present invention, FIG. 2 is a plan view, FIG. 3 is a cross-sectional view showing a mounting state of the cutting blade, and FIG. Sectional drawing which shows the guide structure of a turret and a balance stand, FIG. 5 is a front view which shows the guide device which concerns on this invention, FIG. 6 is a sectional view which shows the connection state with the joint of a turret and a balance stand, FIG. Is a cross-sectional view showing the relationship between the crankshaft and gears, FIG. 8 is a schematic view of a balance mechanism, and FIG. 9 is a front view showing a general guide device. 1 ... Cutting blade, 3 ... Drive device, 4 ... Cam, 4a, 4b ...
… Guiding surface, 16 …… Cam follower mechanism, 16a, 16b …… Cam follower, 18 …… Frame, W… Object to be cut.

Claims (1)

[Claims] 1. A reciprocating cutting device for cutting an object to be cut such as a bread by reciprocally moving a cutting blade with respect to a frame in a longitudinal direction by a driving device, and cutting the frame into one of the frame and the cutting blade. A plurality of cam follower mechanisms composed of two cam followers arranged at required intervals in the blade tip direction are provided, and the two cam followers of the cam follower mechanism are provided on the other side of the frame and the cutting blade on the front and back sides. A cutting blade guiding device in a reciprocating cutting device, wherein a plurality of cams for guiding a cutting surface to move the cutting blade in a reciprocating circular arc convex in the direction of the cutting edge are provided respectively corresponding to the cam follower mechanism. .