JPH0639883Y2 - Belt sander machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a belt sander machine for feeding a processed material to a material feeding passage and performing a grinding process by a grinding head on the material feeding passage.

<Prior Art> A material feeding device composed of a plurality of material feeding driving rolls arranged along a material feeding passage and a grinding head for grinding a processed material are arranged in opposition to each other with the material feeding passage. In addition, there are various belt sander machines provided with a treading roll urged toward the material feeding passage by an ammunition machine before and after the grinding head.

<Problems to be solved by the invention> In the conventional belt sander machine, the tread roll is
With the traveling force of the processed material, the workpiece is pressed against the processed material by an ammunition machine while being rotated, whereby the traveling of the processed material is stably performed. However, in the non-contact state with the processed material, the projecting edge thereof is in a slightly extended position from the processing surface position of the processed material in order to generate elastic contact force, and is in a non-rotating state.

Therefore, when the front end of the processed material comes into contact with the projecting edge of the treading roll as it travels, the treading roll is in a non-rotating state, and therefore the inertial force causes a load on the traveling of the processed material. Occurs and the traveling speed temporarily decreases. And the processed surface part being ground by the grinding head is
Due to the low speed running, excessive polishing is performed and uneven grinding occurs. Further, when the contact impact of the treading roll against the projecting edge is large, the processed material may be damaged.

The present invention aims to eliminate such conventional drawbacks.

<Means for Solving Problems> The present invention is to elastically contact a conductive roll with the roll peripheral surface of a material feeding drive roll and to continuously connect the conductive roll to the treading roll by a winding medium node such as a belt or a chain. Thus, a friction drive mechanism is provided, in which the driving force of the material feeding drive roll is applied to the tread pressure roll to drive and rotate the tread pressure roll along the material feeding direction.

<Operation> The treading roll is rotationally driven in the normal state because the turning force of the material feeding drive roll is transmitted through the conduction roll.

Then, when the processed material is fed and its front end comes into contact with the treading roll, the roll is slightly retracted against the ammunition. At this time, the rotational force of the treading roll is applied from the material feeding drive roll side by the structure in which the conductive roll elastically contacts one of the rolls and wraps around the other roll through the intermediary node. As long as the conductive roll is in elastic contact with the required roll, there is no hindrance to the rotation transmission. Therefore, the treading roll comes into contact with the processed material in a rotated state. Then, since the front end of the processed material comes into contact with the tread pressure roll and at the same time receives a running force from the tread pressure roll, the front end of the work material travels smoothly at a constant speed without stagnation.

<Example> An example of a belt sander will be described with reference to FIG.

Reference numeral 1 is a machine frame, and a material feeding device 3 is arranged on the lower base portion 2.

The material feeding device 3 will be described.

A plurality of material-feeding drive rolls 6 are arranged in the material-feeding frame 5 extending along the material-feeding passage 4, and the material-feeding frame 5
A material feeding motor 7 is provided at the end of the. Each of the material feeding drive rolls 6 is made to interlock by interlocking the chains of sprockets fixed to the extended ends of the rotation shafts of the rolls 6 so as to interlock with each other. By linking with the drive shaft of the material motor 7, each material-feeding drive roll 6 is simultaneously rotated at a constant speed. In addition, each of the chains is kept in tension by engaging a tension wheel that is urged in a tension direction by a cylinder or the like.

Three grinding heads 10a, 10b, 10 in the figure are provided on the material feeding passage 4.
c is provided so that the workpiece w can be sequentially subjected to rough grinding, finish grinding, and super finish grinding.

Here, each of the grinding heads 10a and 10b is provided with a driving roll 11 also serving as a steering wheel at an upper part thereof, and a grinding roll is provided immediately below the driving roll 11.
12 is provided, the sanding belt 13 is hung over the roll, and the grinding material 12 is used to roll-grind the processed material W.

Further, the grinding head 10c has a driving roll 14 for steering and
, The running rolls 15 and 16 are respectively provided in the lower left and right sides in a triangular arrangement, and the pedal pressure pad 17 is disposed between the traveling rolls 15 and 16, and the sanding belt 18 is provided on the upper surface of the work material w by the pedal pressure pads 17. I try to press it.

Foot pressure rolls 20 are provided in front of and behind the grinding heads 10a, 10b, 10c, respectively. The treading roll 20 is an ammunition machine 19 such as a spring.
Is urged toward the material feeding passage 4 side. Further, the treading roll 20 is rotated by a friction drive mechanism in conjunction with the material feeding drive roll 6 in the material feeding passage 4.

An embodiment of the structure of the friction drive mechanism will be described with reference to FIGS.

An auxiliary roll 22 for rubbing is fixed to the end of the material feeding drive roll 6, and one end of a link 23 is rotatably supported on a rotary shaft 21 of the treading roll 20. A conductive roll 25 contacting the outer peripheral surface of the auxiliary roll 22 is rotatably supported by a support shaft 24 fixed to the other end of the link 23, and a pulley 26 is attached to the conductive roll 25. They are concentrically coupled. A pulley 27 is fixedly mounted on the rotating shaft 21 to the treading roll 20, and a V-belt 28 is stretched over the pulley 26 and the pulley 27 so that the treading roll 20 and the conduction roll 25 are linked. ing. Further, one end of the link 23 is extended, and a screw shaft 30 to which a spring hook 31 is screwed so as to be vertically adjustable is supported at the extended end in the vertical direction. Then, a biasing spring 34 is provided between the spring hook piece 33 and the spring hook piece 31 screwed to the screw shaft 32 fixed to the machine frame 1 side so as to be vertically adjustable.
2, the link 23 is biased counterclockwise in FIG. 2, and the conductive roll 25 is elastically contacted with the auxiliary roll 22. The bearing 35 holds the screw shaft 30 so that it can be tilted slightly, and the screw shaft 32 is held by the bearing 36.

In this structure, the conduction roll 25 is elastically contacted with the auxiliary roll 22 that rotates integrally with the material feeding drive roll 6, so that the rotational force of the material feeding drive roll 6 is transmitted to the conduction roll 25 and the pulley 26, and the V belt The turning force is propagated to the tread pressure roll 20 via the 28 and the pulley 27, and the tread pressure roll 20 is rotated.

With this configuration, the processed material w supplied to the material feeding passage 4
Is applied with a traveling force while being supported on the lower surface by the material feeding drive roll 6, and along with the traveling, each grinding head 10a,
When it comes to the position of the treading roll 20 before and after 10b and 10c, the ammunition machine 19 makes contact with the lower edge of the treading roll 20 in the slightly lowered position. With this abutment, the treading roll 20 is pushed and slightly rises, but the link 23 slightly tilts around the rotation shaft 21 by the action of the biasing spring 34, and the conduction roll 25 and the auxiliary roll 22.
Keep in touch. Therefore, the turning force of the material feeding drive roll 6 is transmitted to and maintained by the treading roll 20 regardless of the slight movement of the treading roll 20. And the front end of the processed material w is the tread roller 20.
The traveling force is also applied from the treading roll 20 by contacting the contacting roller with the contact pressure, and even when the contact is made, the traveling speed regulated by the rotation of the material feeding drive roll 6 is maintained without reducing the traveling speed. .

Therefore, for example, when the stepping roll 20 between the grinding heads 10b and 10c comes into contact with the grinding head 10b and 10c in the middle of the material feeding in the material feeding passage 4, the grinding head 10 has a decrease in traveling speed in the conventional configuration.
The machined surfaces at the lower positions of a and 10b will be over-ground due to the speed stagnation, but in the above configuration,
There is no such evil.

Then, when the front end of the processed material w comes to the position of the tread roller 20, the tread roller 20 is pushed a little upward and comes into contact with the processed material w, and the rotation thereof is transmitted to the processed material w to complement smooth running. .

In each of the above-mentioned embodiments, the wrapping medium node of the wear driving mechanism can be appropriately selected from belts, chains, ropes, and the like.

Further, the friction drive mechanism described above can be applied to one or more appropriate number regardless of the number of grinding heads. Furthermore, the vertical positional relationship between the grinding head and the material feeding device does not matter.

<Effect of the Invention> According to the present invention, the driving force of the material feeding driving roll 6 is transmitted to the treading roll 20 through the friction drive mechanism so that the material feeding drive roll 6 is rotated in a normal state. Even if it hits 20,
This does not become a factor for braking the work material w, the work material w can be smoothly transferred at a constant speed by the rotational force of the treading roll 20, and excessive grinding due to the speed stagnation of the work material w,
There is an excellent effect that damage of the processed material can be prevented and beautiful and excellent grinding processing can be achieved.

[Brief description of drawings]

The attached drawings show an embodiment of the present invention. FIG. 1 is a vertical sectional front view of a belt sander machine, FIG. 2 is a front view showing an example of a friction drive mechanism for rotating a treading roll 20, and FIG. It is a figure. 3; material feeding device, 4; material feeding passage, 6; material feeding driving roll, 10a, 10b,
10c; grinding head, 19; ammunition machine, 20; treading roll, 22; auxiliary roll, 23; link, 24; spindle, 25; conduction roll, 26, 27; pulley, 28; V belt, 34; biasing spring

Claims (1)

[Scope of utility model registration request] 1. A material feeding device comprising a plurality of material feeding driving rolls arranged along a material feeding passage, and a grinding head for grinding a processed material, arranged in a facing manner with the material feeding passage. In a wide belt sander provided with a treading roll urged to the material feeding passage side by an ammunition before and after the grinding head, a conductive roll is elastically contacted to the roll peripheral surface of the material feeding driving roll, and By connecting the conduction roll to the treading roll by means of a belt or a winding medial node, the driving force of the material feeding drive roll is applied to the treading roll to drive and rotate the treading roll along the material feeding direction. A belt sander machine equipped with a friction drive mechanism.