JPH04122445U - Belt sander machine pressure pad device - Google Patents

Abstract

(57) [Summary] [Purpose] To make the device more compact and lightweight by removing heavy pad unit mounting members, and to easily replace the pad unit. [Configuration] Mounting frame 1 installed on main body frame 1
1 has a mounting groove 1 perpendicular to the conveyance direction of the workpiece X on the lower surface.
2 is formed, and an inward bearing projection 14 is formed at the lower edge of the corresponding groove wall. A pair of front and rear spring plates 37 are attached to a pad unit 30 having a pad 10 fixed to the lower surface of a pad frame 31, and the tips of both spring plates 37 are placed on a support protrusion 14 and supported in a floating state at all times.
When the piston rod 46 of the air cylinder 43 advances,
The pad unit 30 is pushed down and fixed against the elasticity of the spring plate 37, and the pad 10 presses against the sanding belt 5, and when the piston rod 46 retreats, the restoring elasticity of the spring plate 37 lifts the pad unit 30 to the floating position. The fixation and treading action are released.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is an endless sanding belt that runs in circulation, facing the material feeding table. By pressing the back side of the horizontal running part with a pad, the surface of the sanding belt is Grinding or polishing is performed by pressing the grinding surface of the This invention relates to an improvement in a tread pad device for a belt sander machine.

0002

[Conventional technology]

An overview of this type of belt sander will be explained with reference to FIG. 1, which shows an embodiment of the present invention. I will clarify. The workpiece The material is placed on the belt 3 and conveyed in the direction of the arrow, and above it, the surface is polished. An endless sanding belt 5 with a cut surface is attached to a driving roller 6 and a driven roller 7. and the tension roller 8 to circulate in the direction of the arrow. A tread pressure pad device A according to the present invention is installed above the horizontal traveling section. Workpiece X is transported, and its front end is provided on the front side of tread pad device It reaches the bottom of the tread pressure pad device A after a certain period of time after the passage is detected by the detection device 9. Then, the pad 10 of the tread pressure pad device A descends and applies the sanding belt 5. Press it against the workpiece X, and press it once after the rear end of the workpiece After a certain period of time, when the pedal pressure pad device A is reached, the pad 10 rises and the pedal pressure increases. The workpiece X is removed, and both front and rear edges of the workpiece The surface is ground after preventing the surface from becoming damaged.

0003 As a tread pad device for such a belt sander, the one shown in Fig. 8 has conventionally been used. is known. This is applied to the main body frame 1 via the bevel gear 72 by the rotation of the handle shaft 71. A suspension body 73 that can be finely adjusted up and down is attached, and is formed on the lower surface of the suspension body 73. A mounting elevating body 75 for mounting the pad unit is placed in the housing groove 74 at the front and back of the top surface. A receiving part 7 in which hook parts 76 formed on both end edges protrude from the lower part of the groove walls before and after the housing groove 74. 7, and a sanding bell is installed on the bottom surface of the mounting elevating body 75. A pad is installed on the lower surface of the base body 80 in the mounting groove 78 formed in the direction perpendicular to the running direction of the seat 5. The pad unit 79 to which the pad 10 is fixed is inserted, and the mounting groove 78 and the base 80 are connected to each other. It is fixed by inserting the wedge 82 into the gap between the parts by tightening the bolt 81. and a fluid pressure cylinder 83 formed on the upper surface of the suspension body 73. The tip of the piston rod 84 is fixed to the mounting elevating body 75. . Then, as the piston rod 84 of the fluid pressure cylinder 83 advances, the mounting elevating body 75 and pad unit 79 to press down on the sanding belt 5, and press the sanding belt 5. By retracting the stone rod 84, the mounting elevating body 75 and the pad unit 79 are held. It is designed to release pressure by raising it.

0004

[Problem that the idea aims to solve]

That is, the conventional tread pressure pad device has a suspension body 73 installed on the main body frame 1. Supports the mounting elevating body 75, and further attaches the pad unit 79 to it and lifts it up. Since the structure is such that it is raised and lowered together with the lowering body 75, the device becomes large-scale, and Since the mounting elevating body 75 is heavy, the weight of the entire device is also large. Because it drives the heavy mounting lifting body 75, the fluid pressure with a large driving force is required. There was a drawback that a cylinder 83 had to be provided. In addition, the mounting elevating body 75 is lined up. When the pad unit 79 moves up and down, the latch part 76 of the mounting elevating body 75 touches the stopper. The range of elevation is restricted by the upper surface of the accommodation groove 74 and the receiving portion 77. Nowadays, when high-speed lifting control is required, the heavy mounting lifting body 75 may hit the stopper. Impact noise and vibration caused by the barrels were also a problem.

[0005] Furthermore, when attaching or detaching the pad unit 79, remove and attach the wedge 82. It is troublesome to have to do it each time, and the bolt 8 for inserting the wedge is If 1 is not tightened too loosely or if you forget to tighten it, the parts may be damaged due to the impact during the lifting/lowering operation. There is a risk that the do unit 79 may be misaligned, resulting in uneven treading force, resulting in poor grinding. There were a number of problems, including:

[0006]

[Means to solve the problem]

The tread pressure pad device of the belt sander machine of this invention aims to eliminate the above problems. This is a newly devised design that has a design on the bottom surface of the main body frame in a direction perpendicular to the conveyance direction of the workpiece. A mounting groove is formed with a supporting protrusion on the corresponding groove wall, and the support of the mounting groove is A pad unit, which has a pad fixed to the underside of the base, is attached to the bearing protrusion, and a bullet mounted on the base is attached to the pad unit. It is movable up and down through the body, and is always supported in a floating state, and is attached to the main body frame. The piston rod protruding into the mounting groove can touch and separate from the top surface of the pad unit base. The configuration is equipped with a corresponding fluid pressure cylinder.

[0007]

[Effect]

When the piston rod of the fluid pressure cylinder is advanced, its tip will touch the pad unit. Press the top surface of the base to lower the pad unit against the elastic body's elasticity, and then lower the base. The pad unit is fixed by pressing against the support protrusion of the mounting groove, and , the pad on the bottom of the base presses against the sanding belt and the ground surface is applied to the workpiece. Grinding or polishing is applied by pressing. Retract the piston rod to remove the pressing force. When the pad unit is released, the restoring elasticity of the elastic body will cause the pad unit to rise to its original floating position, and the pad unit will rise to its original floating position. The pressing force on the pad is removed and the pad unit is released.

[0008]

[Effect of the idea]

In other words, in this invention, the pad unit is elastically attached to the mounting groove formed in the main body frame. A structure in which the pad unit is supported through a magnetic body and directly driven by a fluid pressure cylinder. This eliminates the heavy mounting lifting body that was previously required for mounting pad units. Because of this, the device can be made more compact and lighter. Also, the fluid pressure system The cylinder only needs to push down the pad unit against the elastic body's elasticity, so it is small. This can be achieved with a device with a small driving force. In addition, the padded unit is resilient when descending. It is pressed against the support protrusion through the body, and when rising, it is pushed up to a free floating state. It is not structured so that it hits the stopper forcefully and restricts the lifting and lowering. This prevents the generation of impact noise and vibrations.

[0009] In addition, the piston rod of the fluid pressure cylinder is used to press the sanding belt. When the piston rod is advanced, the pad unit is also fixed and the piston rod is retracted. If the padded unit is fixed, it will be released and supported on the bearing protrusion. Therefore, when installing or removing the pad unit, do not release the pad unit. All you have to do is insert and remove the body and the body into the mounting groove, and the installation and removal work can be done in an extremely short time. I can. Also, by tightening conventional bolts, you can insert wedges and tighten parts. If the pad unit is fixed, the bolt may become loose and the pad unit may be damaged. There is no risk of grinding defects due to misalignment of the parts.

0010

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. The overall structure of the belt sander is the same as that explained in the prior art section as shown in Figure 1. Next, the tread pressure pad device A of this embodiment will be explained with reference to FIGS. 2 to 4.

[0011] In the figure, 11 is a mounting frame attached to the main body frame 1 described above. It has an elongated shape in the direction perpendicular to the conveyance direction of the workpiece X, and the A mounting groove 12 for mounting a pad unit 30 to be described later is formed on the surface. There is.

0012 This mounting frame 11 stands on mounting portions 15 formed at two locations on the top surface, front and back. The upper ends of the provided hanging bolts 17 extend horizontally to the front and rear surfaces of the main body frame 1. The head of each bolt 17 and the support plate Elastic contraction of the compression coil spring 21 installed between the washer 20 applied to the upper surface of 19 The inclined surface 16 formed at the upper end of the mounting portion 15 is lifted by the force, and the front end side is is screwed onto a first threaded rod 23 for tilt adjustment attached to the front of the main body frame 1. is applied to the lower surface of the support plate 19 via a wedge body 24 that is driven forward and backward in the arrow direction. , On the other hand, the inclined surface 16 of the mounting portion 15 on the rear end side is formed in a circle formed on the lower surface of the support plate 19. By hitting the arc portion 25, upward movement is regulated and it can be installed in a fixed position. The sea urchin is sleeping.

[0013] Note that when the first threaded rod 23 described above is rotated, the wedge body 24 moves back and forth to move the front side. By changing the pressing position on the inclined surface 15, the mounting frame 11 can be tilted in the front-rear direction. is adjusted, and the screw hole 27 in the horizontal direction formed in the front mounting part 15 is adjusted. , a second threaded rod 28 for fine adjustment of elevation, which is attached to the front of the main body frame 1, is screwed together. When the second threaded rod 28 is rotated, the inclined surface 15 forms an arc with the wedge body 24. While the mounting frame 1 slides on the section 25 and moves back and forth, its vertical position changes. It's starting to be finely tuned.

[0014] The mounting groove 12 of this mounting frame 11 has an inwardly facing lower edge on the corresponding groove wall. A bearing protrusion 14 is formed, and a pad unit 30 is inserted into this mounting groove 12. It is beginning to be contained. This pad unit 30 is located between both bearing protrusions 14. on the lower surface of the elongated pad frame 31 that spans approximately the entire length of the mounting groove 12. , a known pad 10 consisting of an air bag 32, a rubber body 33, an outer covering cloth 34, etc. is fixed. It is.

[0015] A mounting surface 36 is formed at the center of the upper surface of the pad frame 31, and is raised to a higher level. It has approximately the same width as the mounting groove 12 at both the front and rear ends of the mounting surface, and has a downward bulge at the tip. The base end portions of a pair of spring plates 37 each having a curved arcuate portion 38 are placed facing outward. An upper plate 40 having approximately the same width as the mounting groove 12 is placed on top of the mounting groove 12, and bolts 41 are applied to the upper plate 40. Each spring plate 37 is fixed by being tightened. This patched unit The left and right ends of each arcuate portion 38 of the pair of spring plates 37 integrally assembled to the , and is supported by being placed on the support protrusion 14 of the mounting frame 11.

[0016] The air cylinder 43 is mounted on the upper surface of the mounting frame 11 with its rod cover. Insert the boss portion 44 of the The tip of the piston rod 46 protrudes into the mounting groove 12 and the pad unit is attached. It corresponds to the upper surface of the upper plate 40 of 30. A pair of supply and discharge ports 4 of the air cylinder 43 8 is connected to an air supply source 51 and an exhaust port 52 via an electromagnetic switching valve 50. .

[0017] Next, the operation of this embodiment will be explained. When the piston rod 46 of the air cylinder 43 is retracted upward, it is shown in FIG. The tip is spaced above the upper plate 40 of the pad unit 30 so that the pad The unit 30 is supported in the floating position when stored, and the pad 10 is attached to the sanding belt. No treading force is applied to 5.

[0018] By switching the electromagnetic switching valve 50, as shown in FIGS. 3 and 4, the air cylinder 43 When the piston rod 46 is advanced, its tip touches the upper plate 4 of the pad unit 30. 0, the pad unit 30 descends while elastically deforming the spring plate 37. As a result, both left and right edges of the lower surface of the upper plate 40 are pressed against the support protrusion 14 of the mounting groove 12. As a result, the pad unit 30 is fixed, and the pad 10 is fixed in place. The grinding belt 5 is pressed to press its ground surface against the surface of the workpiece X. This results in The workpiece X is ground.

[0019] Retract the piston rod 46 again to remove the pressing force on the pad unit 30. Then, due to the restoring elasticity of the spring plate 37, the pad unit 30 returns to its original floating state as shown in FIG. The pad unit 3 rises to the upper position, the pressure on the pad 10 is removed, and the pad unit 3 The fixation of 0 is released. The above operation prevents the edge sagging phenomenon in which a large amount of both the front and rear edges of the workpiece X are scraped off. To prevent.

[0020] In addition, the workpiece material When cutting the workpiece X, keep the pad unit 30 fixed in the lowered position. This is carried out by sequentially conveying.

[0021] When replacing the pad unit 30, replace the piston rod 46 as shown in Figure 2. If it is withdrawn, will the padded unit 30 be in a free floating state as described above? Then, hold the handle 54 protruding from the front surface of the pad frame 30 to remove the pad unit 30. Remove it from the front side of the mounting groove 12 and install a new part with the spring plate 37 attached in the same way. Place the spring plate 37 of the unit 30 on the support protrusion 14 in front of the mounting groove 12. Just insert it from the side.

[0022] 5 to 7 show how the pad unit 30a is supported in the mounting groove 12 of the mounting frame 11. Another embodiment is shown in which the structure of the portion supported by the supporting protrusion 14 via an elastic body is changed. In this embodiment, circular holes 61 are formed at both front and rear ends of the upper surface of the pad frame 31a. As shown in Fig. 7, it has a cylindrical shape with an open top, and has two A spring receiver 63 formed with a latch flange 64 that can be hooked onto the support protrusion 14 is fitted, The upper plate 40 and each spring receiver are attached to the upper surface of the pad frame 31a with bolts 41. A compression coil spring 65 is installed between the bottom surfaces of the cage 63. this The pad unit 30a is attached to both ends of the locking collar 64 of both spring receivers 63 by the supporting protrusion 14. When placed on the top plate and inserted into the mounting groove 13, a compression coil spring acts on the lower surface of the top plate 40. The pad frame 31a and the pad 10 are lifted and floated by the expansion force of the bullet 65. It is accommodated in the mounting groove 12 in a state where it is closed.

[0023] Then, when the piston rod 46 of the air cylinder 43 is advanced, as shown in FIG. As shown, the pad unit 30a is pushed down while compressing the compression coil spring 65. , the left and right edges of the lower surface of the upper plate 40 are pressed against the bearing protrusion 14, so that the pad is While the pad unit 30a is fixed, the sanding bell by the pad 10 is When the piston rod 46 is pressed back and the pressing force is removed, the pressure is reduced. Due to the restoring force of the compressed coil spring 65, the pad unit 30a returns to its original floating position as shown in FIG. The pad unit 10 is lifted up to remove the pedaling force on the pad 10, and the pad unit The fixation of the port 30a is released.

[0024] In the above embodiment, the pad units 30, 30a are elastically supported in a floating state. The spring plate 37 and compression coil spring 65 for supporting the pad frames 31, 31a Although it is provided in two places at both the front and back ends of the It may be provided at several locations.

[0025] In addition, the present invention is not limited to the air tube suspension type of the above embodiment, but also uses multiple springs. Widely applicable to other types of treadle pad devices such as spring cushion type in which several pieces are arranged in parallel. be able to.

[Brief explanation of drawings]

FIG. 1 is a front view showing the overall structure of a belt sander.

FIG. 2 is a cross-sectional view of one embodiment of the tread pressure pad device of the present invention when viewed from the side in a state in which the tread pressure is released.

FIG. 3 is a side cross-sectional view in a treading state.

FIG. 4 is a sectional view from the front.

FIG. 5 is a partial side sectional view of another embodiment of the present invention in a state in which the pedal pressure is released;

FIG. 6 is a partial sectional view of the pedal in a pressed state.

FIG. 7 is a partially cutaway perspective view of the spring receiver.

FIG. 8 is a side sectional view of a conventional example.

[Explanation of symbols]

X: Work material 1: Main body frame 2: Material feeding table
5: Sanding belt 6, 7, 8: Roller 10: Pad 11: Mounting frame 12: Mounting groove 14: Support protrusion 30, 30a: Pad unit 31, 31a: Pad frame 37: Spring plate 40: Upper plate 43: Air cylinder 46: Piston rod 61: Circular hole 63:
Spring receiver 64: Latching collar 65: Compression coil spring

Claims (1)

[Scope of utility model registration request] [Claim 1] The sanding is carried out by pressing with a pad the back surface of a horizontal running part of an endless sanding belt which circulates around a plurality of rollers attached to a main body frame and which corresponds to the material feeding table. In a belt sander machine that performs grinding or polishing by pressing the ground surface of the belt against a workpiece being conveyed on the material feeding table, a belt sander is provided on the lower surface of the main body frame at right angles to the conveyance direction of the workpiece. forming a mounting groove with a bearing protrusion formed in a corresponding groove wall;
A pad unit with the pad fixed to the bottom surface of the base,
The piston rod is movable up and down through an elastic body attached to the base body and is always supported in a floating state, and a piston rod protruding into the mounting groove of the main body frame can come into contact with and separate from the upper surface of the base body of the pad unit. A treadle pad device for a belt sander, characterized by being equipped with a fluid pressure cylinder compatible with the.