JPS6150763A - Both-side grinding type belt sander machine - Google Patents

Abstract

PURPOSE:To prevent a device from being formed in a large size by use of two sets of belt grinding mechanisms and remove a cause of grinding unevenness, by brinding a sanding belt over a belt guide driving mechanism and depressing the belt to the outer in the inside of a right and a left running part of the belt. CONSTITUTION:A distance between a material feed device 12, 13 and a depressing device 32, 33 in a grinding device 25 si equalized to an attaining thickness of cut for a workpiece X by turning a threaded bar 3, and if the workpiece X is supplied to a material feed passage 16, a belt sanding machine, stably moving the workpiece X while it is supported by an stopping edge piece 7 and depressed by a depressing roll 21 to the side of a feed running part of a material feed belt 10a, grinds a left side of the workpiece X by a depressing pad device 32 and resupplies the workpiece X to a material feed passage 20 again from a rear part by a conveying device 40 to be moved while being depressed by the depressing roll 21 to a material feed belt 10b, grinding a right side of the workpiece X.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a double-sided grinding type belt sander machine for grinding and polishing both corresponding sides of wood, hardboard, resin board, etc.

<Prior art> Conventionally, as a model for grinding and polishing both sides of a workpiece, there has been a two-belt grinder in which a sanding belt is wrapped around a guide drive mechanism with a suitable material path a in between, as schematically shown in Fig. 9. Mechanisms, b, are provided in a corresponding manner, and tread pressure pad devices mc are respectively disposed on the inner surface of the running part on the suitable material passage a side in the grinding mechanism, b, and when the workpiece X runs in the suitable material passage a, There is one in which the sanding belt is pressed against the suitable material passage side by the pressure pad device MC to grind and polish both sides of the workpiece X. By the way, in this type of machine, the workpiece X is pressed against each other by the pressure pads in the grinding section of the suitable material passage a, so there is no grinding standard, and the grinding resistance between both sides of the workpiece X is There is a drawback that the grinding tends to be biased to one side due to unevenness, and the grinding pressure on the - side becomes large, making it impossible to grind both sides uniformly.

In addition, as shown in Fig. 1O, a belt grinding mechanism e consisting of a sanding belt wrapped around a belt guide drive mechanism is provided below the suitable material passage f, and its grinding part is inserted from the opening of the material feeding table d toward the suitable material passage. A material feeding device mg consisting of an endless material feeding belt wrapped around a roll is disposed above the suitable material path f and opposite to the belt grinding mechanism e to form a bottom surface grinding device ah, and each of the above-mentioned A belt grinding mechanism i is provided adjacent to the device above the suitable material path f, and a material feeding device j is provided below the suitable material path f opposite to the belt grinding mechanism, and this is used as an upper surface grinding device. , there is one in which the upper and lower surfaces of the workpiece X traveling through the suitable material path f are ground.

By the way, in the case of such a device, the feeding speeds of the material feeding device Hg and the material feeding device j must be made the same, and a slight deviation in these speeds causes uneven cutting of the workpiece X. In addition, it is difficult to match the material feeding surfaces of the material feeding table and material feeding device ff1j, and adjustment is required when the material feeding belt wears, and if the material feeding surfaces are not the same, it may cause uneven grinding.

<Problems to be Solved by the Invention> The above-mentioned conventional device tends to cause uneven grinding as described above, and since it uses two sets of belt grinding mechanisms, the device is expensive and large. There is.

The present invention aims to eliminate the drawbacks of the conventional devices.

Means for solving the problem of gaps between sanding points> A sanding belt is laid horizontally over a belt guide drive mechanism consisting of a large number of running rolls, etc., and the belt is passed outwards inside the right running part and the left running part of the belt. A grinding mechanism is constructed by arranging tread pressure devices for pressing on the grinding mechanism, and material feeding devices are further provided on the left and right sides of the grinding mechanism via suitable material passages in the front and back direction.

The running direction of the left and right material feeding devices is reversed, the workpiece is fed to the right and left suitable material passages, one side of it is cut by a sanding belt as it travels through the passage, and the workpiece is further removed at the discharge position. The workpiece is re-supplied to the other suitable material passage and sent backwards to grind the other side of the workpiece.

<Example> An embodiment of the present invention will be described.

l is a rectangular base, in the center of which is a screw rod 3 having screws 3a and 3b with different screw directions on the right and left sides,
The side frame 2 & of the base 1.

It is rotatably supported by 2b. The screw rod 3 is 1.
It is reversibly rotated by an appropriate rotation means. The screws 3a and 3b of the screw rod 3 are fitted with material feeding frames 6a and 6b, respectively, and the rotation of the screw rod 3 moves the material in the near direction along the movement guide 5.5 provided on the upper surface of the base 1. Moving. The material feeding frame 6a.

6b, supporting drive rolls 8a, 8b and guide rolls 9a, 9b in the front and rear, respectively, passing the material feeding bells 10a, 10b, and connecting the opposing feeding traveling portions to the material feeding frame 6a.
, 6b is exposed laterally. Further, from the bottom surface of the material feeding frames a and 6b, the material feeding bells 10a and 1
A locking edge piece 7 that supports the lower surface of the workpiece X while it is running is provided along the lower edge of the workpiece 0b.

Furthermore, conveyance support rolls Lla and llb are supported at the front ends of the material feeding frames 6a and 6b so as to be located below suitable material passages 18 and 20, which will be described later.

A material feeding device f2.13 is constructed on the right and left sides of the base 1.

Before and after the material feeding devices 12 and 13, there is a grinding mechanism 2 described later.
5, guide frames 14, 15 are provided, each having a corresponding inner surface shaped like a rectangular shape. The right and left sides of the guide frame 14.15 are provided with suitable material passages 16.20 and are opposite to the material feeding device 12.13, and tread pressure rolls 21, which are urged laterally by bombs, are provided on both sides, respectively. It is being

A grinding frame 26 is fixed to the base 1 and a grinding mechanism 25 is sealed between the concave surfaces of the guide frames 14 and 15.

To explain the grinding mechanism 25, a pair of guide rolls 27a, 28a, 27b, and 28b are provided on the periphery of the grinding frame 26, which correspond to each other at the front and back on the right and left sides, respectively, and a feed roller is provided at the center front part in FIG. A roll 29 is provided, and a tension roll 30 which also serves as a steering wheel is provided at the center rear part, and one of the rolls is used as a drive roll, and a belt indoor drive mechanism is constituted by each of the rolls. A sanding belt 31 is wrapped around the roll group so that it runs in the direction of the arrow in FIG. Further, the guide rolls 27a, 2
The sanding belt 3 is installed between 8a, 27b, and 28b.
1 to the appropriate material passage 16.20 side are provided with left and right stepping pad devices 32.33.

The operation of the double-sided grinding type belt sander will be explained.

First, the screw rod 3 is rotated to make the distance between the material feeding devices 12, 13 and the tread pressure devices 2t32, 33 of the grinding mechanism 25 equal to the achieved cutting thickness of the workpiece X, and the material feeding device 12p is The drive roll 8a is rotated so that the material bell) loa travels in the direction of the arrow in FIG.

Then, when the workpiece X is supplied to the suitable material passage 16 with the tip end supported on the conveyance support roll lla, the workpiece X
has its lower surface supported by the locking edge piece 7, and is moved stably by the material feeding belt 10a while being pressed against the feeding traveling portion side of the material feeding belt loa by the treading roll 21, and the treading pad device 32 is sealed. At the center, the left side is cut and taken out from the rear of the suitable material passage 16.

The workpiece X is re-supplied from the rear part to the suitable material passage 20 again by a conveying device 40 (to be described later) or manually, and is moved by the material feeding belt 10b while being pressed against the upper surface side of the material feeding belt 10b by a treading roll 21. , its right side is ground and polished and taken out from the front part of the suitable material passage 20.

In the above, the workpiece X from the rear of the suitable material passage 16
The removal of the material, the movement to the appropriate material passage 20♂, and the resupply to the appropriate material passage 20 can be automated by a conveying device 40, which will be described later.

Further, in the above embodiment, a tread pressure roll may be used as the tread pressure device in place of the tread pad devices 32 and 33. In this case, a large grinding thickness can be obtained, making it suitable for rough grinding. .

Next, as shown on the right side of FIG. 1.2, a conveying device 40, which is installed at the rear of the double-side grinding type belt sander machine and supplies the workpiece X from the suitable material passage 16 to the suitable material passage 20, will be explained.

Reference numeral 41 denotes a guide frame disposed at the rear of the base l, in which actuation grooves 42 in the width direction are formed at regular intervals. Further, a rectangular frame 43 is provided on the outer periphery of the guide frame 41, and a large number of transport drive rolls 44 are arranged in the front and rear direction between the left and right outer surfaces of the guide frame 41 and the left and right inner surfaces of the rectangular frame 43.
are arranged in a row, and a conveyance path 45 that coincides with the suitable material passage 16 at the front and rear, and a conveyance path 46 that coincides with the suitable material passage 30 at the front and rear.
and is provided.

Roughly within the operating groove 42, as shown in FIG. 3, a sprocket 47 is supported in a rectangular arrangement on the inner surface of one of the grooves of the guide frame 41, and a chain 48 is wound around the tin rocket 47. Six mounting pieces 51 in the figure are supported on the chain 48 by an idling shaft 50. As shown in FIG.

The mounting piece 51 has a substantially cross shape, and its left and right upper corners serve as mounting sections 52a and 52b.

Further, a guide roller 53 is protruded from the lower end of the mounting piece 51 as shown in FIG. There is. The guide groove 54 is deviated downward by the distance between the idle shaft 50 and the guide roller 53 with respect to the chain 48 which is stretched around the sprocket 47 and runs in a rectangular manner, and therefore, as shown in FIG. The guide roller 53 is supported by the guide groove 54 so as to be always directly below and below the free rotation shaft 50, and is maintained at a fixed position with the mounting portion 52a1 and the mounting portion 52b facing upward while the roller 53 is running.

The operation of the transport device 40 will be explained.

The workpiece X sent out from the appropriate material passageway 6 travels through the conveyance path 45 by the drive of the conveyance drive roll 44, and passes through the rear end from the appropriate material passage 16 at the rear end of the material feeding frame 6a. This is detected by the limit switch 35, and the detection drives the sprocket 47 and moves the chain 48. In order to prevent the workpiece X from traveling excessively on the transport path 45, a rectangular frame 4 is installed at the rear end of the transport path 45.
3 is provided with a stopper piece 43a. As the chain 48 runs, as shown in FIG. 3, the mounting piece 51, which is located at a position A with the mounting portion 52a slightly below the upper surface of the transport drive roll 44, rises and transfers the workpiece X onto the transport drive roll 44. It takes over from the station and stops at the entrance just above it. Each time the workpiece X is sent out from the suitable material passage 16 to the conveyance path 45, the chaser 48 moves intermittently, and the mounting piece 51 moves to position C. However, there is a holding surface 57 on the guide frame 41 that is slightly higher than the mounting surface of the mounting section 52a.
is provided, and when moving from the position A to the position C, the workpiece X rides on the holding surface 57 and is released from being placed on the first mounting part 52a. The workpiece X on this holding surface 57 is pushed out by the upright part of the mounting piece 51 that came from the previous position opening,
At the position, the user transfers to the mounting section 52b. Roughly, the mounting piece 51 moves intermittently to position 21, and the workpiece X is placed on the conveyance path 46 at this position.

Then, the material to be processed is re-supplied to the suitable material path 20 by driving the transport drive roll 44, and the other surface of the workpiece X is ground.

In the above-mentioned embodiment, five pieces of workpiece X can be retained on the m-feeding device 40 side, and the supply interval from the suitable material passage 16 to the conveyance path 45 can be shortened, and the polishing process of the workpiece X can be performed at high speed. It has the advantage of being scalable.

In FIGS. 5 and 6, 60 indicates another conveyance device.

Here, reference numeral 61 denotes a rectangular frame body, and conveyance paths 63 and 64 are provided in the suitable material passage 16 and the suitable material passage 20, which are constructed by arranging a large number of conveyance drive rolls 62 that are continuous in the front and back direction. Belt drive shafts 65 and 66 are provided on both sides of the rectangular frame 61 in the front and back direction, and the left belt drive shaft 66 is connected to the conveyor cylinder 6 as shown in FIG. 7.8.
7 to move up and down. A conveyor belt 68 is wrapped around the belt drive shafts 65 and 66 at appropriate intervals,
At the lowered position of the belt drive shaft 66, the conveyor belt 6
8 upper surface is a conveyance path 63. The position is adjusted to be lower than the upper surface of the conveyance drive roll 62 of f54. Further, in the raised position of the belt drive shaft 66, the conveyance belt 68 is approximately horizontal, and is adjusted to be at the same level as or slightly above the conveyance drive roll 62 at this position.

Furthermore, on the left side of the conveyor belt 68.

Two GaL control plates 69, 69 are arranged which coincide with the feeding traveling portion of the material feeding belt lOb at the front and rear. The regulation plate 69
．． 69 is V1 attached to a feed screw 70 supported in the left-right direction by a rectangular frame 61, and by linking the sprocket at the end of the screw rod 3 and the sprocket at the end of the feed screw 70 with a chain 71, the regulation is achieved. The plates 69, 69 and the material feeding device 13 are interlocked so that the feeding running portion of the material feeding belt lOb and the regulating plate 69, 69 are always aligned in the front and rear directions.

The function of the transport bag m60 will be explained.

As shown in FIG. 7, in a state in which the conveyor belt 68 is tilted downward about the belt drive shaft 65, the two workpieces X are sent out from the suitable material passage 16 onto the conveyance drive roll 62 of the conveyance path 63. When the limit switch 35 detects passage of the rear end of the workpiece X, the belt drive shaft 66 is raised almost simultaneously, and the conveyor belt 68 is raised above the upper surface of the conveyor drive roll 62, almost horizontally, as shown in FIG. position. Therefore, the workpiece X is placed on the conveyor belt 68, and since the conveyor belt 68 is being driven, the workpiece X moves to a position where it comes into contact with the regulation plate 69, 69. . Limit switches 73 are provided on the regulation plates 69 and 69, and this detects that the workpiece X has come into contact with the regulation plates 69 and 69, and upon this detection, the conveyor belt 6B is lowered again. As a result, the inclined position shown in FIG. 7 is reached, and the workpiece X is left behind on the transport drive roll 62 of the transport path 64. The workpiece X mounted on the conveyance drive roll 62 is re-supplied to the suitable material passage 20 side by the rotational drive of the conveyance drive roll 62, and other surfaces are ground and polished.

As another conveyance device for the conveyance bag fi40.60, a conveyance path consisting of a large number of conveyance driving rolls is provided in alignment with the suitable material passage 16 and the suitable material passage 20 in the front and back, and
A large number of transport cylinders that move in the left-right direction are provided beside the transport path that corresponds to the suitable material passage 16, and a pressure contact plate provided at the rod end of the cylinder is applied to the workpiece X sent out from the suitable material passage 16. It may be configured such that it is sent out to the other conveyance path; in this case, a regulating plate identical to the aforementioned regulating plates 69 and 69 is provided near the other conveying route.

Various conveyance devices are conceivable for re-supplying the workpiece X sent out from the suitable material passage 16 to the suitable material passage 20 in this way.

Transport equipment as mentioned above! ! 40.60 when connected to the double-sided grinding type belt sander machine of the present invention.

It becomes possible to supply and take out the workpiece X from the front side of the main body, and there are advantages such as manual re-supply at the rear part is omitted and the burden on one worker is reduced.

Effectiveness> Is the appropriate material passage 16.20 drawn to the left and right of the grinding mechanism 25 to feed the material? The stirrups 12 and 13 are provided so that the left and right sides of the sanding belt 31 of the grinding mechanism 25 perform double-sided grinding and polishing of the workpiece X. can be applied, making it compact and low in energy consumption.

a) The workpiece X can be pressed against the material feeding belt side with stable pressure, and the grinding surface becomes beautiful without causing uneven grinding as much as possible.

C) Because the appropriate passageways 16.20 are placed on the left and right.

It is not necessary to align the material feeding surfaces as in the conventional device of the 10th rgJ.

It has excellent effects such as

[Brief explanation of the drawing]

The accompanying drawings show embodiments of the present invention, and FIG. 1 is a plan view, and FIG. 2 is a plan view.
The figure is a side view, FIG. 3 is a sectional view taken along the line A-A in FIG. 1, FIG. 4 is a side view of the chain 48, FIG. 7.8 is a side view showing the operation of the conveyor belt 68, and FIG. 9.10 is a schematic side view of the conventional system. 10a, job; Material feeding belt 12, 13; Material feeding device
16,20. Appropriate material passage 25; Grinding mechanism 31; Sanding belt 32, 33° Pressure pad device 40, 6
0; Conveyance device applicant: Takekawa Iron Works Co., Ltd. Agent: Patent attorney: Kita Matsuura Figure 3: 40: 70! '8 Figure 69 7゜No. 92

Claims (1)

[Scope of Claims] 1) A sanding belt is laid horizontally with a belt guide drive mechanism consisting of a large number of running rolls, etc., and the belt is pressed outward on the inside of the right running part and the left running part of the belt. 2) A double-sided grinding type belt sander machine, characterized in that a grinding mechanism is constructed by respectively disposing tread pressure devices, and further, a suitable material device is provided on the left and right sides of the grinding mechanism via a suitable material passage in the front and back direction. Double-sided grinding type belt sander machine according to claim 1) in which the device is constituted by a tread pad device3) Claim 1) in which the tread device is constituted by a tread roll Double-sided grinding belt sander machine described