JPH089138Y2 - Dry ice block cutting device - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a device for cutting dry ice blocks, and more specifically to cutting dry ice blocks, that is, relatively large blocks of dry ice into square shaped small pieces. Related to the device.

(Prior Art) Conventionally, a device for cutting block-shaped dry ice into square shaped small pieces has been disclosed in Japanese Utility Model Publication No. 55-115794. The cutting device disclosed in this publication includes a case with an open bottom, a dry ice block accommodated in the case is moved on a stand, and the lower end of the dry ice block is moved by a large number of circular saws installed on the stand. While moving the part laterally,
This was done by cutting in the vertical direction and finally slicing horizontally to sequentially cut out rectangular shaped small pieces.

[Problems to be solved by the invention] However, in such a conventional dry ice block cutting device, there is no means for detecting the remaining amount of dry ice block inside the case, and there is no remaining amount necessary for cutting out to the minimum extent. Regardless of the size of the cut piece, the regular small piece cut out last time does not have the specified size, or it scatters inside the equipment, or the operator constantly monitors the decrease of dry ice blocks during operation, There was the inconvenience of having to manage the operation such as the stop of.

The purpose of the present invention is to solve the above-mentioned conventional problems, and detects the remaining amount of dry ice blocks during the cutting of rectangular shaped small pieces to prevent the cutting of shaped small pieces out of the specified dimensions. An object of the present invention is to provide a cutting device for dry ice blocks that prevents scattering in the device and does not require operator's operation monitoring.

(Means for Solving the Problem) The present invention relates to a box having at least a bottom opening for accommodating a dry ice block, a device for moving the box, and a lower end portion of the dry ice block exposed from the bottom opening of the box. In a cutting device for a dry ice block provided with a plurality of cutting tools installed on the floor of the moving path of the box to cut while moving, a remaining amount detecting device installed at a moving back position on the moving path of the box, The remaining amount detecting device includes an opening formed in the side wall of the box and is operated by relatively entering into the inside from the opening of the side wall of the box and hitting a dry ice block inside to detect the presence thereof. It is characterized in that it is provided with an abutting sensor rod.

(Operation) According to the dry ice block cutting apparatus of the present invention, the dry ice block is accommodated in the box having an open bottom. afterwards,
Move the box to transfer the dry ice mass inside,
During this transfer, a cutting tool is used to make cuts in the horizontal and vertical directions at the lower end of the dry ice block, and finally it is sliced horizontally to cut out rectangular shaped small pieces, and this operation is repeated as one cycle thereafter. To be taken. At that time, when the box advances to the folding position on the movement path, the abutting sensor rod of the remaining amount detecting device enters the inside from the opening of the side wall of the box and contacts the lump of dry ice to detect its presence. . The small pieces of dry ice chunks are cut out one after another by repeated reciprocating movements, and gradually decrease (height decreases). At some point, when the abutting sensor rod enters the inside of the opening of the side wall of the box, the dry ice chunks dry It will not abut due to the decrease of. Despite the progress of the box in this way, when the abutting sensor rod is not pushed in, it detects that there is no remaining dry ice chunk and ends the operation when the box returns to the start position. Controlled by.

(Embodiment) Hereinafter, a dry ice lump cutting device of the present invention will be described in more detail with reference to an embodiment shown in the accompanying drawings.

FIG. 1 shows a dry ice block cutting device (hereinafter simply referred to as a cutting device) according to an embodiment of the present invention.
The cutting device 10 comprises an open-bottomed box 12 suspended on two guide rails 11, the box 12 being at the top thereof a cylinder arrangement 13 arranged along the guide rails 11.
It is reciprocally movable by a drive unit 15 including two chains 14a and 14b. That is, this drive device 15
At the tip of the piston rod of the cylinder device 13, two sprockets 16 are supported in parallel, and the guide rail 11
Sprockets 17a and 17b are arranged near the front end (left side in FIG. 1) and near the rear end (right side in FIG. 1), respectively. One chain 14a is connected at one end thereof to the front hanger 12a to the guide rail 11 of the box 12, and the sprocket 17a at the front end of the guide rail and one sprocket 16 at the tip of the piston rod are successively wound around. The other end is fixedly attached to a proper position of the machine frame 18. In addition, the other one chain 14b is the rear hanger 1
One end is connected to 2b, and it is hooked around the sprocket 17b at the rear end of the guide rail and the other sprocket 16 at the tip of the piston rod, and the other end is fixed and attached to a proper position of the machine frame 18. As a result, when the piston rod expands and contracts due to the action of the cylinder device 13, the box 12 reciprocates along the guide rail 11.

The position where the box 12 is at the rear end of the guide rail (first
(Fig.) That is, the floor surface 19 at the start position is close to the lower end of the box 12 so as to leave a slight gap, and adjacent to the floor surface 19 is a slice for slicing on the front side in the moving direction of the box 12. The circular saw 20 or horizontal saw is horizontally arranged so that its surface is flush with the floor surface 19. This circular saw 20 is fixed to the upper end of a rotary shaft 21 arranged at the lower part thereof, and the rotary shaft 21 transmits a rotational force from a drive shaft of a motor 22 installed on its side through a pulley 23 and a belt 24. It is rotated.

Adjacent to the circular saw 20 for slicing, an elevating plate 26 having a large number of slits 25 is arranged on the front side in the moving direction of the box 12. The slit 25 extends in the moving direction of the box 12 and is formed in parallel in the transverse direction thereof, and at the lower part of the lifting plate 26 corresponding to the position of each slit 25,
A large number of circular saws 27 or fixed saws are fixed to a common horizontal rotary shaft 28. Therefore, the teeth of each circular saw 27 move in and out relative to each slit 25 as the lift plate 26 moves up and down.

The vertical movement of the lift plate 26 is performed by the cylinder device 29 and the link member. That is, two support shafts 30a, 30b extending in the direction traversing the box movement path are arranged below the elevating plate 26, with both ends bearing. Each of these support shafts 30a and 30b has two link members (two link members attached to one support shaft 30a are designated by reference numeral 31a.
, And one end of two link members attached to the other support shaft 30b is indicated by reference numeral 31b), and the other ends thereof are pivotally attached to legs 32 formed on the lower surface of the lifting plate 26. There is. As a result, the elevating plate 26 moves up and down by rotating either one of the support shafts 30a and 30b. In this embodiment, the support shaft 30a is rotationally driven.

A lever 33 is fixed to the support shaft 30a at its end, and one end of the lever 33 is a piston rod end of a cylinder device 29 mounted at a proper position of the machine frame 18 by expanding and contracting the lever 33 to center the support shaft 30a. It is pivotally attached so that it can be rotated. As a result, the support shaft 30a is rotated via the lever 33 as described above by the operation of the cylinder device 29, and a vertical movement force is applied to the lift plate 26. A position adjusting bolt (not shown) is screwed and attached to the machine frame 18 so as to sandwich the lever 33 in the rotation direction of the other end of the lever 33. When the lever 33 rotates, these bolts come into contact with the other end to stop the rotation thereof, so that the rising position and the falling position of the lift plate 26 can be adjusted. The maximum lift position of the lift plate 26 is such that the surface of the lift plate 26 substantially coincides with the surface formed by the floor surface 19 and the slicing circular saw 20. In addition, the lifting plate 26
The maximum descending position of is the slice thickness because the difference in height between the position and the position of the tooth of the circular saw 20 for slicing is the slice thickness, and is therefore set according to the designed slice thickness.

On the front side in the box moving direction adjacent to the elevating plate 26, a large number of round bars 35 arranged in a horizontal plane substantially the same as the maximum descending position of the elevating plate 26 and extending across the box moving path.
Are provided with pedestals 36 that are spaced from each other and are rotatably supported at both ends. As is clear from FIG. 2, this cradle 36 extends across both sides of the box movement path, and teeth are projected from the slit-shaped intervals between the round bars 35 at the lower part of this cradle 36. As described above, a large number of circular saws 38, that is, moving saws attached to the common rotary shaft 37 are arranged. The rotating shaft 37 is supported by a bearing 41 attached to a pedestal 40 mounted on rails 39 arranged at intervals so as to be movable along the longitudinal direction of the receiving base 36. A motor 42 that rotationally drives the rotary shaft 37 is also mounted on the pedestal 40, and a belt is attached to the pulley of the drive shaft of the motor 42 and the pulley attached to the end of the rotary shaft 37.
43 is applied, whereby the rotation of the motor 42 is transmitted to the rotating shaft 37.

This pedestal 40 reciprocates on the rail 39 by connecting the rod ends of the double-rod double-acting type air cylinder device 44 mounted on the upper part of the machine frame 18 and the respective sides of the pedestal 40 with a chain 45. To be done. As a result, the circular saw 38 supported by the pedestal 40 is driven to rotate by the motor 42, but is moved by the movement of the pedestal 40 from the end of the receiving base 36 across the box movement path to the opposite end.

The saw mounting shaft portion 37a of each rotary shaft 37 for rotating the moving saw 38 is basically cantilevered by two bearings 41 so that the saw can be replaced.
In order to prevent the shaft from swinging, the end of the saw mounting shaft portion 37a is supported by a steadying bearing 85. This steady rest 85 uses a pair of upper and lower bearing pedestals 86, 87 with mating surfaces 86a, 87a sloping outward to facilitate the attachment / detachment and centering of the steady rest 85, and easy replacement of the circular saw. It is possible to. The configuration in which the circular saw support rotary shaft is cantilevered in this manner, the saw is attached to the overhanging portion, and the bearing as described above for the steady rest is adopted at the end thereof is similarly adopted in the fixed saw 27. There is.

A remaining amount detection device 46 for detecting the remaining amount of the dry ice block in the box 12 is provided in a part of the frame of the cradle 36 on the box movement path and beyond the dry ice block support position by the round bar 35. ing. The remaining amount detecting device 46 is an air cylinder device 47 arranged such that an abutting sensor rod 47a composed of a piston rod faces the box 12, and movement of an internal piston attached to the outer peripheral portion of the cylinder of the air cylinder device 47. Detected (on (or off) when the piston is pushed back,
It is composed of a cylinder sensor 48 that outputs an off (or on) signal at the rod protruding position.
On the other hand, the box 12 facing the abutting sensor rod 47a which is the piston rod of the air cylinder device 47.
An opening 49 which allows the rod 47a to enter is formed in the side wall 12c portion of the.

As a result, when the box 12 accommodating the lump of dry ice advances along the movement path and is positioned on the pedestal 36, the abutment sensor rod 47a of the remaining amount detection device 46 relatively moves from the opening 49 of the box side wall 12c to the inside. (Fig. 3), and if there is a sufficient amount of dry ice inside, hit it and move the piston to turn the cylinder sensor 48 on (or off). Also, if the dry ice block is reduced, the abutting sensor rod 47a receives no acting force, and in this case, the cylinder sensor 48 remains off or on, which results in the regular shape of this time. The small piece cutting is the final round and the operation ends. As is clear from this, the remaining amount of dry ice lumps depends on the height L of the abutting sensor rod 47a from the pedestal 36, but at least the height L of the rod 47a is dry ice by the circular saw 38. Depth of cut into the bottom of the block, that is, lift plate
2t <L (preferably 2t
(Just above) is set. That is, since the fixed small pieces are cut out while the box 12 is returning to the start side after the remaining amount of dry ice in the box 12 is detected by the cradle 36, the remaining amount is the expected remaining amount. This is because it is necessary to detect the absence.

Such a remaining amount detecting device 46 also functions as a shock absorber. That is, the air cylinder device
The piston of 47 is pressed in a direction to push the piston rod outward with a predetermined air pressure, so when the abutting sensor rod 47a, which is the piston rod, comes into contact with the block of dry ice and the piston is pushed back, the air cylinder device Due to the internal air pressure of 47, the moving force of the dry ice block will be quietly received.

Further, the abutting member 47b fixed to the tip of the abutting sensor rod 47a is formed of a cold-resistant resin material in consideration of heat insulation with the air cylinder device.

A box 12 with an open bottom that holds a block of dry ice
A clamp device 50 is provided to prevent rattling of the dry ice block inside. As shown in FIGS. 1 and 2, the clamp device 50 has one side wall 12c facing the door 12d provided on the front side of the box 12, and the side wall 12c.
Two of them are attached to the side wall 12c on the right side as viewed in FIG. 1 which is connected to the 12c, whereby the dry ice blocks are pressed and fixed to the opposing walls from two directions orthogonal to each other.

An ice prevention plate made of ultra-high-molecular polyethylene resin or cold-resistant resin such as fluororesin is attached to the inner wall surface of the box 12 and the floor surface 19 in order to prevent ice accumulation of the dry ice block. There is.

Next, the operation of the cutting device 10 in this embodiment will be described with reference to the flowchart shown in FIG.

First, power on the entire disconnecting device (step 60)
Then, preparation for supplying air to each air cylinder device and preparation for supplying electric power to each motor are performed.
Then, when the start switch is turned on (step 61), the fixed saw 27 and the movable saw 38 start rotating. After that, open the door 12d of the box 12 and put the dry ice block,
The door 12d is closed (step 62) and further the machine frame 18
The external door (not shown) provided on itself is closed (step 63). A switch is incorporated into the outer door, which is turned on when the outer door is closed, which causes the horizontal saw 20 to start rotating (step 6).
Along with 4), the clamp device 50 operates to press and fix the dry ice block against the inner wall surface of the box 12, and the box 12 starts to move (step 65). The movement of the box 12 is at the front end position of the lifting plate 26, and when the lifting plate 26 descends, a part of the dry ice block does not hit the teeth of the fixed saw 27 that relatively projects from the slit 25 thereof. Cradle
Pause at the position of 36 and clamp device 50 at the same time
Is released and the block of dry ice rides on the lift plate 26 (step 66). Then, the elevating plate 26 descends (step 6
7) Along with this, the dry ice block is pulled out from the lower end open portion of the box 12 by the amount by which the lift plate 26 is lowered. Then, the clamp device 50 is operated again to fix and hold the dry ice block in the box in this state.
12 moves again (step 68), positions at the center of the pedestal 36 of the dry ice block, and stops (step 69). At this time, the abutting sensor rod 47a of the remaining amount detecting device 46 enters inside through the side wall opening 49 of the box 12 as described above, and it is judged whether or not there is the remaining amount (step 70). That is, when the remaining amount is sufficient, the abutting sensor rod 47a comes into contact with the dry ice block and the piston is pushed back, whereby the cylinder sensor 48 is turned on or
It is turned off and the on or off signal is stored as information in an electronic control unit (not shown). The electronic control device, to which this information is input, determines that the next cutting out is possible and controls the operation so as to continue the operation even after the cutting out that time.

When the dry ice block is positioned on the cradle 36, the moving saw 38 begins to move (step 71), which makes a vertical cut in the bottom surface of the dry ice block (step 72). Then, the box 12 is returned in the reverse direction (step 73), at which time the moving speed is switched to a low speed (step 74), and the fixed saw 25 causes the dry ice block to pass on the lifting plate 26 at that speed. A lateral cut is made in the bottom of the block of dry ice (step 75). Meanwhile, the movable saw 38 is returned to the original standby position (step
76).

The dry ice block that has been laterally scored by the fixed saw 27 is horizontally trimmed by the horizontal saw 20 (step 77) by the subsequent movement of the box 12, which results in the vertical and lateral cuts already made. Combined with the above, square shaped small pieces are cut out, and these fixed small pieces are taken out from the outlet chute 51. Cradle of dry ice
If the remaining amount detection device 46 determines that there is a remaining amount when located at 36, the dry ice block whose bottom surface has been sliced by the horizontal saw 20 does not return to the original starter position, and the moving direction is at this position. The operation is reversed, and the operation thereafter is returned to step 65. Then, the elevating plate 26 is returned to the ascending position at the time when this slice is completed or not (step 79).

By the way, if the dry ice block in the box 12 has only one cut-out, the box 12 will
The abutment sensor rod 47a that enters the inside when reaching the position of 36 does not contact the dry ice block, and the cylinder sensor 48 remains off or remains on.

A plurality of cylinder sensors (not shown) are attached to each of the cylinder devices 13, 29, 44, and the box 12,
The position of the lift plate 26 and the pedestal 40 of the movable saw are confirmed. Then, those sensor signals are taken into the electronic control unit and, together with the signal of the cylinder sensor 48, become a judgment condition for executing the next operation step by the program of the control unit.

When the signal of the cylinder sensor 48 when the box 12 reaches the moving back position on the cradle 36 is captured by the electronic control unit, and when the slice process by the horizontal saw 20 is completed and the returning position is reached ( Step 78), Step 65,
Alternatively, it is determined which step 80 to proceed to.

If it is determined in step 78 that there is no remaining amount, this time is regarded as the final time, the box 12 moves backward, and the last cut is performed in the middle, and the box 12 returns to the start position as it is (step 80), where the clamp is performed. Device 50
Is released (step 81), and the remaining small piece of dry ice is left on the floor surface 19. Then, the rotation of the horizontal saw 20 is stopped (step 82), and the operator judges here whether to finish the work or to continue the work by re-inserting a new dry ice block into the box 12, and when the work is finished, Turn on the stop button and remove the dry ice residue (step 83).
The outer door is opened, the door of the box 12 is opened to replace a new dry ice block (step 84), and each door is closed again to return to step 62 and the operation is repeated again.

(Effect of the Invention) As described above, according to the dry ice block cutting device of the present invention, since the remaining amount of dry ice block is constantly checked by the detection device during operation of the device,
It is excellent because it does not cut out small pieces with non-specified dimensions at the final stage, does not scatter in the device, and there is no need for the operator to always be near to monitor the reduction of dry ice blocks. Produce an effect.

[Brief description of drawings]

FIG. 1 is a front view showing a cutting device for dry ice blocks according to an embodiment of the present invention with a part of the machine frame removed. FIG. 2 is a top view of the cutting device shown in FIG. FIG. 4 is a front view showing the remaining amount detecting device in a state in which the box is at the detection position.
The figure is a flow chart for explaining the operation of the cutting device. 10 ... Cutting device, 11 ... Guide rail, 12 ... Box, 13 ... Cylinder device for moving box, 20 ... Horizontal saw, 27 ... Fixed saw, 38 ... Moving saw, 46 ... Remaining amount Detector, 49 ... Aperture.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display area // F25C 5/02

Claims (1)

[Scope of utility model registration request] 1. A box having at least a bottom opening for accommodating a dry ice block, a device for moving the box, and a box for cutting a lower end portion of the dry ice block exposed from the bottom opening of the box during the transfer. In a cutting device for a dry ice block provided with a plurality of cutting tools installed on the floor of the moving path, a remaining amount detecting device installed at a moving back position on the moving path of the box and a side wall of the box are formed. An abutting sensor rod that includes an opening and is operated by the residual amount detecting device relatively entering into the inside from the opening of the side wall of the box and hitting an inside dry ice mass to detect its presence. A device for cutting dry ice blocks.