JPH059390Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a device for removing concrete deposits, such as a device suitable for removing concrete from scaffolding boards and footboards used in construction scaffolding. .

[Background of the idea]

Scaffolding boards are dangerous for walking on if concrete remains attached to them, so cleaning work is required to remove the adhering concrete when reusing them.

Conventional kerating equipment that automatically cleans scaffolding boards has been designed to remove adhering concrete by placing a rotating dresser on the workpiece conveyance path and allowing the moving workpiece to slide into contact with the dresser. .

By the way, the thickness of scaffolding boards and walking boards differs depending on their planar size, and the contact conditions of a dresser fixedly placed in a fixed position with the scaffolding board will change depending on the change in thickness. A problem arises in that uniform cleaning work cannot be performed.

[Purpose of invention]

This idea was made in consideration of the above points, and it is possible to automatically adjust the position of the dresser to follow changes in the thickness of the workpiece, and also to prevent the drastic drop of the dresser after passing the workpiece. It is an object of the present invention to provide a device for removing concrete deposits that can eliminate damage caused by a dresser colliding with a conveyance path.

[Means to achieve the purpose]

In order to achieve the above objectives, this invention places a pinch roller for workpiece detection on the workpiece conveyance path, and a rotating dresser for cleaning the workpiece at a position in front of the pinch roller in the workpiece conveyance direction. The dresser is linked so that the dresser moves upward when a pinch roller detects a workpiece, and a pinch roller for detecting the workpiece is arranged in front of the conveyance path of the dresser in the conveyance direction, and is positioned ahead of the dresser and this dresser in the conveyance direction. The pinch rollers are interlocked to hold the dresser in the raised position when the pinch rollers detect the workpiece.

[Function] The work being sent along the conveyance path pushes up the pinch roller by its thickness at its tip, so the dresser linked to the pinch roller is pulled up and raised, and the contact conditions between the incoming work and the dresser become constant. , adhering concrete is removed by a dresser that rotates relative to the workpiece.

When the workpiece enters the next pinch roller and is pushed up, this pinch roller holds the dresser in the raised position, so even if the rear end of the workpiece passes directly under the dresser, the dresser remains in the raised position. is held, and the dresser is ready to enter the next workpiece without descending.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in FIGS. 1 to 5, a pinch roller 2 for detecting the work is installed at the top of a conveyor path 1 such as a conveyor that conveys a work A such as a scaffolding board or a step board horizontally in the longitudinal direction. A dresser 3 is arranged at the front in the transport direction, and a plurality of pairs of pinch rollers 2 and dressers 3 are arranged side by side in the transport direction, with only the pinch roller 2 at the forefront in the transport direction.

The mounting structure of the pinch roller 2 is such that a mounting shaft 5 is rotatably installed between support walls 4 erected on both sides of the conveyance path 1, supported by bearings, and a plurality of L The letter-shaped swinging arms 6 are fixed with their lower ends facing forward in the conveyance direction, and a shaft 7 is fixed between the tips of each swinging arm 6 so as to be parallel to the mounting shaft 5.
The pinch roller 2 is rotatably attached to this shaft 7,
The pinch roller 2 is configured to be able to swing vertically about a mounting shaft 5.

At both ends of the mounting shaft 5, an arm 8 extending forward in the conveyance direction is provided at a portion protruding to the outside of the support wall 4.
The dresser 3 is mounted so as to be able to freely swing up and down about the mounting shaft 5, and a center shaft 9 of the dresser 3 is rotatably supported between the ends of both arms 8 in a state parallel to the mounting shaft 5.

The dresser 3 can freely swing up and down about the mounting shaft 5, and both support walls 4 are provided with a vertical elongated hole 10 through which the center shaft 9 passes, and the lower limit position is supported by a stopper 29. It is becoming more and more like this.

A short suspension shaft 11 is fixed at a position above the center shaft 9 of the dresser 3 on the inner side of both support walls 4, and a large diameter sprocket 12 is attached to this suspension shaft 11 and rotates together with this sprocket 12. A small diameter sprocket 13 is rotatably supported.

One end of a chain 14 is connected to the upper end of the swing arm 6 of the pinch roller 2.
The middle of the chain 14 winds and meshes with the large-diameter sprocket 12, and the lower end of the hanging chain 14 is connected to the idler ring 15 of the center shaft 9, and the swinging arm 6 of the pinch roller 2
The dresser 3 is held in a suspended state.

Therefore, the pair of pinch rollers 2 and dresser 3 are linked in vertical movement, and when the pinch roller 2 rises upon detection of the workpiece A and the swing arm 6 rotates, the chain 14 is pulled and the dresser 3 is moved up and down. also rises, and the lower outer periphery reaches a predetermined contact condition with the workpiece A.

In other words, the pinch roller 2 is pushed up by the thickness of the workpiece A, and the dresser 3 also rises by an amount that follows this, so even if the thickness of the workpiece A changes, the amount of contact between the dresser 3 and the workpiece A remains constant. can be kept.

In the pinch rollers 2 excluding the pinch roller located at the rear end in the conveyance direction, a sprocket 16 loosely fitted to the mounting shaft 5 is fixed on one side of the swinging arm 6 located at both ends. Small diameter sprocket 1 of the suspension shaft 11
An endless chain 17 is wound around the chain 17, and a coil spring 1 is installed in the middle of the upper part of the chain 17.
8 is interposed.

As mentioned above, the swinging arm 6 of the pinch roller 2
When the small-diameter sprocket 13 of the hanging shaft 11 is interlocked via the chain 17, the pinch roller 2 located at the front in the transport direction maintains the raised state of the dresser 3 located at the rear, and the rear end of the workpiece A is The dresser 3 can be prevented from descending even after passing directly under the dresser 3.

That is, when the pinch roller 2 located at the rear in the conveyance direction detects the workpiece A and moves upward, the dresser 3 is pulled up, the large diameter sprocket 12 and the small diameter sprocket 13 integrated therewith are rotated by the chain 14, and the workpiece A is conveyed. Pinch roller 2 located in front of the direction
An endless chain 17 wound between sprockets 16 is sent in the rotational direction.

The pinch roller 2 at the front in the conveyance direction is in the lowered position, and the endless chain 17 has a coil spring 18 interposed in the upper part, so the rotation of the small diameter sprocket 13 causes the endless chain 17 to
The coil spring 18 is stretched, and its lower part is left slack between the sprockets 13 and 16.

When the tip of the workpiece A pushes up the pinch roller 2 at the front in the transport direction, the swinging arm 6 of the pinch roller 2 rotates, and the sprocket 16 fixed to the swinging arm 6 sends the endless chain 17 in the rotational direction. Make the part tense.

When the rear end of the workpiece A passes the rear pinch roller 2 in the transport direction, the pinch roller 2 returns to the lowered position and releases the tension on the chain 14, but both the large and small sprockets 12 and 13 are connected to the endless chain 1.
The tension in the lower part of 7 prevents the dresser 3 from rotating in the downward direction, and as a result, the dresser 3 remains in the raised position, causing unnecessary pressure on the workpiece A and preventing it from being transported. The dresser 3 will not fall onto the body 1, and damage to the dresser 3 will be prevented.

When the rear end of the workpiece A passes directly under the pinch roller 2 at the front position, the endless chain 17 rotates due to the rotation of the sprocket 16 due to the lowering of the pinch roller 2, and the rear dresser 3 is lowered. However, at this time, the rear pinch roller 2
If a new work A is sent to the dresser 3, the rear pinch roller 2 will hold the dresser 3 in the raised position and will not lower it.

Each of the dressers 3 is driven using a single motor, and a structure is adopted in which the dressers 3 are interlocked in a state that allows vertical movement of the dresser 3.

That is, the sprocket 21 is attached to the end of the mounting shaft 5 of each pinch roller 2 so as to freely rotate, and the intermediate sprocket 22 is attached to the outer surface of the support wall 4 between each pinch roller 2.
As shown by the two-dot chain line in the figure, each sprocket 2
An endless chain 23 is sequentially wound around 1 and 22 in a zigzag pattern, and the chain 23 is driven by a motor (not shown), and the pinch roller 2
A sprocket 24 fixed to the mounting shaft 5 of the dresser 3 and a sprocket 25 fixed to the center shaft 9 of the dresser 3 are linked by an endless chain 26, allowing each dresser 3 to swing around the mounting shaft 5 while simultaneously moving in the same direction. It is designed to rotate to

Although not shown in the drawings, each pinch roller 2 is elastically biased by a spring to return to the lowered position, and the endless chain 17 with a coil spring 18 has its upper half omitted and both ends thereof A chain or wire fixed to the sprockets 13 and 16 or the pulley may be used instead.

6 to 11 show the specific structure of the dresser 3 and several different examples thereof.

In the first example of the dresser 3 shown in FIGS. 6 to 9, a plurality of plates 31 are fixed to a center shaft 9 whose both ends are supported by arms 8 so as to maintain a predetermined distance between opposing surfaces. , a plurality of shafts 32 are parallel to the center shaft 9 at positions between the plates 31 around the center shaft 9, and are arranged at equal intervals on the same circumference centered on the axis of the center shaft 9. .

In the case of FIG. 7, five shafts 32 are arranged in a circle around the center shaft 9, and the center shaft 9 is arranged between each shaft 32.
A stopper shaft 33 is arranged at a closer position, and a large number of dresser members 34 are attached to each shaft 32 in a row.

The above-mentioned dresser member 34 is made of a springy metal wire with a relatively large wire diameter, and is made of a long wire made from opposite parts of a winding part 35 which is spirally wound one to several times so as to fit around the shaft 32. It has a structure in which the piece 36 and the short piece 37 protrude in substantially the same direction.

The dresser member 34 is arranged so that the elongated piece 36 is located on the outside when rotating about the center axis 9.
The winding portion 35 is fitted onto the shaft 32, and the dresser members 34 are mounted so as to be closely aligned between the plates 31, as shown in FIG. The overall length of the dresser member 34 is shortened by the spiral winding portion 35, and sufficient elasticity is added to the dresser member 34.

The dresser member 34 attached to the shaft 32 has a seventh
As shown in the figure, by sandwiching the short piece 37 between the center shaft 9 and the stopper shaft 33 and positioning and fixing it with respect to the center shaft 9, the long piece 37
is arranged to protrude outward and rearward in the rotational direction, and the tip of the elongated piece 36 protrudes outward from the outer periphery of the plate 31.

The above dresser 3 has elongated pieces 36 arranged in a comb-like shape in the axial direction around the center shaft 9, and these comb-like elongated pieces 36 are arranged in a brush shape at regular intervals in the circumferential direction. When rotated in contact with the top surface of the workpiece A, each long piece 36 rubs the top surface of the workpiece A due to its spring deflection, as shown by the dashed line in FIG.
The concrete adhering to the top surface will be peeled off and removed by the brushing effect.

Note that the long piece 36 in the dresser member 34
The tip of the long piece 36 is preferably made to have improved wear resistance, and in addition to being hardened, a chip 38 of wear-resistant material is attached to the tip of the long piece 36 as shown in FIGS. 8 and 9. You may also do so.

Further, the dresser 3 of the second example shown in FIGS. 10 and 11 has a large number of recesses 42 on the outer periphery of a drum 41 attached to a center shaft 9 serving as a rotating body.
A dresser member 34 using a coil spring is embedded in this recess 42.

In this second example, the center shaft 9 is supported horizontally and rotated, and the surface of the workpiece A is rubbed with the tip of the dresser member 34 of a coil spring protruding from the outer periphery to peel off and remove attached concrete.

As mentioned above, the second example is the dresser member 3
Since 4 is formed by a coil spring, the length of the long metal wire can be shortened, and sufficient elasticity can be obtained even if a wire with a large diameter is used.

Coil springs can also be made into a double structure by fitting a large-diameter coil spring from the fixed end to an appropriate length, or by changing the winding pitch or diameter of a single coil spring.
It may be possible to provide stiffness or adjust the elasticity to obtain the optimum peeling effect depending on the material and type of the workpiece.

In this way, when a spring or a coil spring is used for the dresser member in the dresser 3, the dresser 3 is kept in the raised position after the workpiece A has passed, and the dresser member is prevented from being damaged by contact with the conveyance path 1 during the lowering. There is an advantage that 34 can be protected.

Further, the dresser 3 is not limited to the roller structure as shown in the drawings, but may also adopt a planar rotation type in which a dresser member is attached to the lower surface of a disk and rotated by a motor.

The kerating device of this invention has the above-mentioned structure, and before supplying the workpiece A, each pinch roller 2 and dresser 3 are in a standby position at the lowered position, as shown in the right half of FIG.

Workpiece A placed on conveyance path 1 is sent from the left side to the right side in Figure 1, and when its tip pushes up pinch roller 2, dresser 3 located in front pulls up workpiece A by an amount corresponding to the thickness of workpiece A. When the workpiece A passes under the rotating dresser 3, the surface of the workpiece A is rubbed by the dresser 3, and the adhering concrete is scraped off.

When the workpiece A pushes up the front pinch roller 2, the rear dresser 3 is held in the raised position as shown in Figure 2, and even if the rear end of the workpiece A passes directly under the dresser 3, the workpiece A continues to rise. remains as it is,
By supplying the next workpiece to the rear pinch roller 2, the dresser 3 performs the cleaning operation on the next workpiece while remaining in the raised position.

〔effect〕

As described above, according to this invention, the pinch roller and the dresser are linked so that the dresser also rises as the pinch roller rises due to the workpiece, and the dresser rises when the pinch roller located at the front in the conveyance direction rises. The height position of the dresser can be automatically kept constant according to the thickness of the workpiece, and even if the thickness of the workpiece changes, the cleaning work can be performed under constant conditions. Even after passing, the dresser does not fall down, and the dresser does not fall directly onto the workpiece or onto the conveyance path, causing damage.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view showing the main parts of the cleaning device according to this invention, Fig. 2 is a longitudinal sectional front view showing the same operating state, Fig. 3 is a plan view of the main parts, and Fig. 4 is a dresser hanging device. Figure 5 is a vertical cross-sectional view of the lower part, Figure 5 is a perspective view showing the structure of the main part, Figure 6 is the first part of the dresser.
A front view showing an example of the above, FIG. 7 is a longitudinal side view of the same as above,
8 and 9 are perspective views showing different examples of the dresser member in the same as above, FIG. 10 is a front view showing a second example of the dresser, and FIG. 11 is a longitudinal sectional side view in the same. DESCRIPTION OF SYMBOLS 1... Conveyance path, 2... Pinch roller, 3... Dresser, 5... Mounting shaft, 6... Swinging arm, 9
... Center shaft, 11 ... Suspension shaft, 12 ... Large diameter sprocket, 13 ... Small diameter sprocket, 1
4...Chain, 16...Sprocket, 17...
Endless chain.

Claims (1)

[Scope of utility model registration request] A pinch roller for detecting the workpiece is placed on the workpiece conveyance path, and a rotating dresser for cleaning the workpiece is placed in front of the pinch roller in the workpiece conveyance direction.
A pinch roller and a dresser are interlocked so that the dresser rises when the pinch roller detects a workpiece, and a pinch roller for detecting the workpiece is arranged in front of the conveyance path of the dresser in the conveyance direction, and the pinch roller is arranged in front of the dresser and the dresser in front of the dresser in the conveyance direction. A device for removing concrete deposits, in which a pinch roller located at is interlocked to hold a dresser in a raised position when the pinch roller detects a workpiece.